What Is Vocabulary | Vocabulary Retention — How Words Stay Learned Over Time

VOCABULARY RETENTION · LONG-TERM MEMORY · SPACING · RETRIEVAL PRACTICE · CONSOLIDATION · FORGETTING · DURABLE WORD LEARNING · DELAYED RECALL

Vocabulary retention is the persistence of word knowledge over time. A word is retained when its form, meaning and useful patterns remain accessible after the immediate lesson has ended—hours, days, weeks or months later. Retention is therefore different from short-term performance. A learner can look excellent during study because the word is still active in working memory and then fail a delayed test once that temporary support disappears.

Long-term retention depends on more than repetition. Research on second-language vocabulary shows strong roles for spacing, successful retrieval, repeated encounters, consolidation, context variation, sleep, meaningful encoding and later reuse. The challenge is to strengthen a lexical representation enough that it survives forgetting while remaining flexible enough to be accessed in new contexts.

This guide explains vocabulary retention, durable learning, forgetting, retrieval practice, spaced practice, expanding spacing, massed practice, consolidation, lexical integration, maintenance, interference, delayed testing, relearning and long-term vocabulary memory. It also shows why easy practice can produce impressive immediate scores while difficult-but-successful retrieval can produce stronger later memory.

A word is not retained because it was once learned. It is retained because the memory can still be rebuilt when time has weakened the cue.

This is a new umbrella owner. Existing eduKateSG specialist articles on spacing, sleep and consolidation, retrieval-induced forgetting, lexical consolidation and vocabulary practice remain untouched.

1. Vocabulary retention in one table

Factor	What helps retention	What weakens retention	Important caution
Spacing	distributed encounters over time	massed repetition only	spacing can increase practice difficulty
Retrieval	successful effortful recall	passive rereading only	failed retrieval needs feedback
Consolidation	time, sleep and integration	continuous interference	consolidation is gradual
Context	some variation after meaning is stable	one frozen example forever	too much variation too early can overload
Meaning depth	rich semantic links	single vague gloss	over-elaboration can distract
Form strength	stable spelling/sound representation	weak or competing forms	meaning memory can outlast form memory
Maintenance	later reuse and review	long periods without access	low-value words may not deserve maintenance
Feedback	rapid correction after errors	rehearsal of wrong form/meaning	feedback should preserve retrieval effort

2. Retention is not immediate performance

A word that can be repeated immediately may still be fragile.

Immediate success can depend on recency, visible prompts and working-memory activation.

Delayed success is stronger evidence that the lexical trace has stabilised.

Retention should therefore be measured after time has passed, not only at the end of the lesson.

3. Spacing

Spaced practice separates encounters with a word across time.

The gap allows activation to fall, so the next encounter requires greater reconstruction.

This effort can strengthen long-term memory when the item is still retrievable or quickly relearned.

Spacing is robust, but the best interval depends on the desired retention period and learner state.

4. Massed practice

Massed practice repeats items with little delay.

It often feels fluent because the answer remains highly accessible.

That ease can create an illusion of mastery.

Massed practice can be useful for initial encoding, but durable learning usually needs later spaced return.

5. Retrieval practice

Retrieval practice requires the learner to reconstruct the word from meaning or another cue.

Successful retrieval strengthens access routes more directly than passive exposure alone.

Retrieval also reveals what the learner cannot yet access.

Feedback is important after errors so the wrong response is not reinforced.

6. Repetition

Repeated encounters matter because one exposure rarely establishes robust lexical knowledge.

But repetitions are not equivalent: copied repetition, recognition and effortful recall impose different cognitive demands.

The timing and task format change how much learning each repetition produces.

Retention grows when repetitions require useful reconstruction rather than mere re-seeing.

7. Consolidation

New word learning initially depends on recent episodic traces and gradually becomes integrated with existing lexical knowledge.

Consolidation strengthens the representation and reduces vulnerability to forgetting.

Sleep has been associated with lexical integration in several word-learning studies.

Consolidation is one reason time between sessions can be productive rather than wasted.

8. Semantic depth

A word linked to concepts, examples, contrasts and prior knowledge has more retrieval routes.

A one-line translation can support initial learning but may remain brittle.

Depth should be relevant rather than decorative.

Useful semantic elaboration makes later reconstruction easier because multiple cues converge on the same lexical item.

9. Form retention

Meaning and form can decay at different rates.

A learner may remember what a word means but lose its exact spelling or pronunciation.

Form retention needs targeted oral and written retrieval.

This is especially important for irregular spelling, unusual stress or confusable neighbours.

10. Contextual variation

Repeated learning in varied contexts can support flexible knowledge.

However, context variation also increases processing demands.

If meaning is still unstable, too much variation may hinder learning rather than help.

A useful sequence is stable initial encoding followed by increasingly varied use.

11. Sleep and retention

Sleep is associated with memory consolidation and lexical integration.

A word learned before sleep is not automatically mastered, but offline consolidation can support integration.

Repeated retrieval across days still matters.

Sleep should be understood as part of a learning system, not a substitute for practice.

12. Interference

New or similar words can compete with recently learned items.

Semantic grouping can help organisation but can also increase confusion when several close items are introduced together.

Phonological and orthographic neighbours can likewise compete.

Spacing similar items and sharpening contrasts can reduce interference.

13. Forgetting is not total erasure

A failed recall does not prove that all learning is gone.

Partial traces can remain in form familiarity, recognition, meaning or relearning speed.

This is why forgotten words are often relearned faster than truly novel ones.

Retention should therefore be studied as graded strength rather than a binary stored/lost state.

14. Maintenance

Some words require occasional later use to remain accessible.

High-frequency words maintain themselves through ordinary exposure.

Specialist or low-frequency words may need deliberate review.

Maintenance should be proportional to future value; not every rare word deserves permanent active retention.

15. Productive retention

A word may remain recognisable long after productive access has weakened.

Writing and speaking therefore need their own delayed tests.

Meaning-to-form retrieval is often more fragile than form-to-meaning recognition.

High-value vocabulary should be periodically retrieved productively, not only re-read.

16. Receptive retention

Receptive memory can remain strong even when output access declines.

This matters for reading-heavy vocabulary, technical terminology and low-frequency words.

For some items, receptive retention is sufficient.

Learning goals should determine whether productive maintenance is necessary.

17. Retention and metacognition

Learners often overestimate retention after fluent study.

Delayed self-testing exposes the gap between feeling and durable memory.

Judgments become better calibrated when learners repeatedly compare predictions with later performance.

Metacognitive calibration improves study scheduling because learners stop reviewing only what feels difficult now.

18. How to measure retention

Use delayed tests rather than only immediate tests.

Separate recognition, recall, spelling, pronunciation and use.

Change examples so memorised sentences cannot carry the result.

Retention is strongest when several aspects of lexical knowledge survive time and reduced support.

19. Teaching for retention

Teach the word accurately, retrieve it, revisit it after delay and then vary the context.

Prioritise high-utility words for deep durable retention.

Use brief later reviews instead of one giant exposure block.

Design forgetting into the schedule: a small amount of weakening can make the next retrieval more productive.

20. Retention in the AI era

AI makes re-access effortless, but effortless lookup can mask weak internal memory.

Use AI to create spaced quizzes, varied contexts and delayed prompts after the learner attempts recall.

Do not let instant answer availability replace retrieval.

Durable lexical knowledge still requires internal reconstruction.

21. Vocabulary retention casebook

1. New word learned once from a definition

Primary mechanism: one-shot encoding. Likely state: very fragile. First move: add several spaced encounters and meaning-to-form retrieval.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

2. Word repeated ten times in one minute

Primary mechanism: massed repetition. Likely state: looks strong immediately. First move: retest after a day and distribute later practice.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

3. Word recalled correctly after one day

Primary mechanism: early retention. Likely state: promising but not durable yet. First move: schedule another retrieval after a longer interval.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

4. Word recognised but not recalled

Primary mechanism: receptive retention only. Likely state: partial retention. First move: use cued then free productive retrieval.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

5. Word meaning remembered but spelling lost

Primary mechanism: semantic > orthographic retention. Likely state: split representation. First move: practice spelling from meaning, not copying.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

6. Spelling remembered but meaning vague

Primary mechanism: orthographic > semantic retention. Likely state: surface familiarity. First move: rebuild concept with examples and contrasts.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

7. Pronunciation forgotten after reading study

Primary mechanism: print-only retention. Likely state: mode-specific gap. First move: add audio recognition and oral recall.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

8. Meaning retained but collocation forgotten

Primary mechanism: semantic > phraseological retention. Likely state: use gap. First move: review natural partners.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

9. Word retained only in one sentence

Primary mechanism: context-bound retention. Likely state: fragile transfer. First move: vary sentence, topic and grammar.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

10. Word retained across three topics

Primary mechanism: flexible retention. Likely state: stronger representation. First move: increase delay rather than immediate repetition.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

11. Word learned before sleep and recalled next day

Primary mechanism: possible consolidation benefit. Likely state: useful but not proof of mastery. First move: retest later and productively.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

12. Word forgotten after holiday

Primary mechanism: maintenance gap. Likely state: access weakened. First move: relearn and schedule lower-frequency maintenance.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

13. Technical term retained by specialist

Primary mechanism: domain-supported retention. Likely state: natural maintenance. First move: use authentic domain exposure rather than flashcards.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

14. Travel word forgotten after trip

Primary mechanism: goal-specific attrition. Likely state: expected low reuse. First move: accept receptive loss unless future need returns.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

15. Academic connector retained across essays

Primary mechanism: high-utility maintenance. Likely state: self-reinforcing. First move: use across genres to deepen control.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

16. Rare synonym repeatedly forgotten

Primary mechanism: low-value target. Likely state: poor payoff. First move: consider dropping active-learning priority.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

17. Core verb sense retained but idiom forgotten

Primary mechanism: sense-specific decay. Likely state: partial lexical loss. First move: review phrase as separate unit.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

18. Phrasal verb particle forgotten

Primary mechanism: form-pattern decay. Likely state: multiword weakness. First move: retrieve full phrase, not verb alone.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

19. Word family base retained, derivative forgotten

Primary mechanism: morphological partial retention. Likely state: family asymmetry. First move: contrast forms and word classes.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

20. False friend error returns after correction

Primary mechanism: interference-driven relapse. Likely state: competing mapping. First move: use repeated contrastive retrieval.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

21. Two similar new words swap meanings

Primary mechanism: semantic interference. Likely state: competition. First move: separate practice and add diagnostic contrasts.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

22. Two similar-sounding words swap forms

Primary mechanism: phonological interference. Likely state: form competition. First move: increase spaced discrimination practice.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

23. Word retained in writing but not speaking

Primary mechanism: mode-specific productive retention. Likely state: oral access weak. First move: spoken retrieval with pronunciation.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

24. Word retained in speaking but not spelling

Primary mechanism: oral > print retention. Likely state: orthographic weakness. First move: dictation and spelling from meaning.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

25. Word retrieved only with first-letter cue

Primary mechanism: cue-dependent retention. Likely state: partial access. First move: fade cues gradually.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

26. Word retrieved only from translation

Primary mechanism: L1-dependent retention. Likely state: narrow cue route. First move: add definition, image and context cues.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

27. Word retrieved from definition but not image

Primary mechanism: semantic cue specificity. Likely state: limited cue network. First move: vary cues.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

28. Word retained in flashcards but not reading

Primary mechanism: task-bound retention. Likely state: recognition transfer weak. First move: embed in authentic text.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

29. Word retained in reading but not free writing

Primary mechanism: receptive/productive split. Likely state: output weak. First move: delayed sentence generation.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

30. Word used correctly in exam weeks later

Primary mechanism: durable productive retention. Likely state: strong outcome. First move: lower review frequency.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

31. Word remembered after six months with no review

Primary mechanism: high natural recurrence or strong encoding. Likely state: self-maintained. First move: identify natural exposure sources.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

32. Word relearned much faster than first time

Primary mechanism: savings. Likely state: residual trace. First move: use fewer repetitions than for novel items.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

33. Word immediately remembered after first review

Primary mechanism: high residual accessibility. Likely state: maintenance success. First move: extend next interval.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

34. Word repeatedly fails after long spacing

Primary mechanism: interval too ambitious. Likely state: retrieval breakdown. First move: shorten interval until successful.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

35. Word succeeds only with very short spacing

Primary mechanism: weak memory strength. Likely state: early-stage learning. First move: increase repetitions before extending gap.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

36. Word becomes easier after several successful sessions

Primary mechanism: strengthened retention. Likely state: cumulative retrieval effect. First move: continue with expanding intervals.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

37. Learner studies only favourites

Primary mechanism: uneven maintenance. Likely state: metacognitive bias. First move: schedule weak but valuable items.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

38. Learner reviews everything daily

Primary mechanism: over-review. Likely state: inefficient ease. First move: increase spacing for mastered items.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

39. Learner never reviews old vocabulary

Primary mechanism: maintenance failure. Likely state: avoidable attrition. First move: use cumulative review.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

40. Learner copies definitions repeatedly

Primary mechanism: passive repetition. Likely state: weak retrieval strength. First move: switch to active recall.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

41. Learner quizzes before seeing answer

Primary mechanism: retrieval practice. Likely state: higher effort. First move: keep prompt difficulty manageable.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

42. Learner gets answer wrong then checks immediately

Primary mechanism: failed retrieval with feedback. Likely state: useful correction opportunity. First move: retry after short delay.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

43. Learner gets answer wrong repeatedly

Primary mechanism: unstable encoding. Likely state: error risk. First move: reduce difficulty and rebuild form/meaning.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

44. Learner studies semantically related set together

Primary mechanism: possible interference. Likely state: confusion risk. First move: space related items or contrast deliberately.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

45. Learner studies related set with clear contrasts

Primary mechanism: structured semantic learning. Likely state: potentially helpful. First move: retain contrast labels and spaced retrieval.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

46. Learner sees word in six varied texts

Primary mechanism: context diversity. Likely state: broad retention potential. First move: test core meaning across contexts.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

47. Learner sees word six times in same paragraph

Primary mechanism: local repetition. Likely state: high familiarity, limited transfer. First move: add later context variation.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

48. Learner hears and reads word together

Primary mechanism: multimodal encoding. Likely state: stronger form binding possible. First move: later test modes separately.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

49. Learner explains word in own words

Primary mechanism: generative semantic encoding. Likely state: richer trace. First move: follow with delayed recall.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

50. Learner teaches word to someone else

Primary mechanism: retrieval + elaboration. Likely state: potentially strong retention. First move: check accuracy before repetition.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

51. Learner uses word in personal example

Primary mechanism: self-referential encoding. Likely state: memorable cue. First move: later vary beyond personal context.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

52. Learner makes a drawing for concrete word

Primary mechanism: dual coding. Likely state: strong image support. First move: ensure spelling and sound also retained.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

53. Learner uses picture for abstract word

Primary mechanism: weak fit. Likely state: possible oversimplification. First move: use scenarios and relations instead.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

54. Learner sleeps poorly after study

Primary mechanism: consolidation risk. Likely state: possible weaker retention. First move: rely on continued spaced practice rather than assumptions.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

55. Learner crams before test and scores well

Primary mechanism: short-term performance. Likely state: retention uncertain. First move: retest after delay.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

56. Learner spaces study and feels slower

Primary mechanism: desirable difficulty. Likely state: potential long-term benefit. First move: judge by delayed outcome.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

57. Learner stops practice after first success

Primary mechanism: premature criterion. Likely state: fragile retention. First move: require successful retrieval across sessions.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

58. Learner continues after mastery

Primary mechanism: overlearning. Likely state: can strengthen retention but costs time. First move: balance with opportunity cost.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

59. Word occurs naturally every day

Primary mechanism: environmental maintenance. Likely state: automatic spacing. First move: reduce deliberate review.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

60. Word occurs once a year

Primary mechanism: low natural maintenance. Likely state: high attrition risk. First move: decide whether active retention is worth maintaining.

Immediate-versus-delayed check: compare performance now with performance after a meaningful delay. If the difference is large, the earlier success was partly supported by short-term activation.

Recognition-versus-recall check: test both directions. A learner may still recognise the word even when productive recall has weakened, which indicates partial rather than total forgetting.

Form-versus-meaning check: determine whether spelling, pronunciation, meaning, collocation or grammar has decayed. Retention is multidimensional and different components can weaken at different rates.

Spacing decision: choose the next interval based on successful effortful retrieval. If recall is effortless, lengthen the interval; if the word is lost repeatedly, shorten it.

Maintenance value: ask how likely the word is to recur naturally and how important productive access will be. High-utility items deserve stronger long-term maintenance than decorative low-value words.

Interference check: identify similar forms or meanings that could be competing. If confusion rather than pure forgetting is the problem, contrastive practice may be more useful than extra repetition.

Context-flexibility check: retrieve the word in a new sentence, mode or topic. Durable memory should eventually function outside the exact context in which the item was learned.

Relearning signal: if the word has been forgotten, track how many trials are needed to restore it. Faster relearning is evidence that some memory trace remained.

Long-term criterion: treat the item as durably retained only after successful delayed performance under reduced support. The goal is persistent usable access, not one perfect session.

22. Second-stage retention protocol: scheduling, cue fading and maintenance

1. Retention protocol — New word learned once from a definition

Schedule: begin from the current state—very fragile—and plan the next review only after identifying whether the bottleneck is one-shot encoding. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

2. Retention protocol — Word repeated ten times in one minute

Schedule: begin from the current state—looks strong immediately—and plan the next review only after identifying whether the bottleneck is massed repetition. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

3. Retention protocol — Word recalled correctly after one day

Schedule: begin from the current state—promising but not durable yet—and plan the next review only after identifying whether the bottleneck is early retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

4. Retention protocol — Word recognised but not recalled

Schedule: begin from the current state—partial retention—and plan the next review only after identifying whether the bottleneck is receptive retention only. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

5. Retention protocol — Word meaning remembered but spelling lost

Schedule: begin from the current state—split representation—and plan the next review only after identifying whether the bottleneck is semantic > orthographic retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

6. Retention protocol — Spelling remembered but meaning vague

Schedule: begin from the current state—surface familiarity—and plan the next review only after identifying whether the bottleneck is orthographic > semantic retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

7. Retention protocol — Pronunciation forgotten after reading study

Schedule: begin from the current state—mode-specific gap—and plan the next review only after identifying whether the bottleneck is print-only retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

8. Retention protocol — Meaning retained but collocation forgotten

Schedule: begin from the current state—use gap—and plan the next review only after identifying whether the bottleneck is semantic > phraseological retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

9. Retention protocol — Word retained only in one sentence

Schedule: begin from the current state—fragile transfer—and plan the next review only after identifying whether the bottleneck is context-bound retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

10. Retention protocol — Word retained across three topics

Schedule: begin from the current state—stronger representation—and plan the next review only after identifying whether the bottleneck is flexible retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

11. Retention protocol — Word learned before sleep and recalled next day

Schedule: begin from the current state—useful but not proof of mastery—and plan the next review only after identifying whether the bottleneck is possible consolidation benefit. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

12. Retention protocol — Word forgotten after holiday

Schedule: begin from the current state—access weakened—and plan the next review only after identifying whether the bottleneck is maintenance gap. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

13. Retention protocol — Technical term retained by specialist

Schedule: begin from the current state—natural maintenance—and plan the next review only after identifying whether the bottleneck is domain-supported retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

14. Retention protocol — Travel word forgotten after trip

Schedule: begin from the current state—expected low reuse—and plan the next review only after identifying whether the bottleneck is goal-specific attrition. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

15. Retention protocol — Academic connector retained across essays

Schedule: begin from the current state—self-reinforcing—and plan the next review only after identifying whether the bottleneck is high-utility maintenance. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

16. Retention protocol — Rare synonym repeatedly forgotten

Schedule: begin from the current state—poor payoff—and plan the next review only after identifying whether the bottleneck is low-value target. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

17. Retention protocol — Core verb sense retained but idiom forgotten

Schedule: begin from the current state—partial lexical loss—and plan the next review only after identifying whether the bottleneck is sense-specific decay. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

18. Retention protocol — Phrasal verb particle forgotten

Schedule: begin from the current state—multiword weakness—and plan the next review only after identifying whether the bottleneck is form-pattern decay. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

19. Retention protocol — Word family base retained, derivative forgotten

Schedule: begin from the current state—family asymmetry—and plan the next review only after identifying whether the bottleneck is morphological partial retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

20. Retention protocol — False friend error returns after correction

Schedule: begin from the current state—competing mapping—and plan the next review only after identifying whether the bottleneck is interference-driven relapse. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

21. Retention protocol — Two similar new words swap meanings

Schedule: begin from the current state—competition—and plan the next review only after identifying whether the bottleneck is semantic interference. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

22. Retention protocol — Two similar-sounding words swap forms

Schedule: begin from the current state—form competition—and plan the next review only after identifying whether the bottleneck is phonological interference. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

23. Retention protocol — Word retained in writing but not speaking

Schedule: begin from the current state—oral access weak—and plan the next review only after identifying whether the bottleneck is mode-specific productive retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

24. Retention protocol — Word retained in speaking but not spelling

Schedule: begin from the current state—orthographic weakness—and plan the next review only after identifying whether the bottleneck is oral > print retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

25. Retention protocol — Word retrieved only with first-letter cue

Schedule: begin from the current state—partial access—and plan the next review only after identifying whether the bottleneck is cue-dependent retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

26. Retention protocol — Word retrieved only from translation

Schedule: begin from the current state—narrow cue route—and plan the next review only after identifying whether the bottleneck is L1-dependent retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

27. Retention protocol — Word retrieved from definition but not image

Schedule: begin from the current state—limited cue network—and plan the next review only after identifying whether the bottleneck is semantic cue specificity. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

28. Retention protocol — Word retained in flashcards but not reading

Schedule: begin from the current state—recognition transfer weak—and plan the next review only after identifying whether the bottleneck is task-bound retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

29. Retention protocol — Word retained in reading but not free writing

Schedule: begin from the current state—output weak—and plan the next review only after identifying whether the bottleneck is receptive/productive split. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

30. Retention protocol — Word used correctly in exam weeks later

Schedule: begin from the current state—strong outcome—and plan the next review only after identifying whether the bottleneck is durable productive retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

31. Retention protocol — Word remembered after six months with no review

Schedule: begin from the current state—self-maintained—and plan the next review only after identifying whether the bottleneck is high natural recurrence or strong encoding. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

32. Retention protocol — Word relearned much faster than first time

Schedule: begin from the current state—residual trace—and plan the next review only after identifying whether the bottleneck is savings. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

33. Retention protocol — Word immediately remembered after first review

Schedule: begin from the current state—maintenance success—and plan the next review only after identifying whether the bottleneck is high residual accessibility. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

34. Retention protocol — Word repeatedly fails after long spacing

Schedule: begin from the current state—retrieval breakdown—and plan the next review only after identifying whether the bottleneck is interval too ambitious. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

35. Retention protocol — Word succeeds only with very short spacing

Schedule: begin from the current state—early-stage learning—and plan the next review only after identifying whether the bottleneck is weak memory strength. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

36. Retention protocol — Word becomes easier after several successful sessions

Schedule: begin from the current state—cumulative retrieval effect—and plan the next review only after identifying whether the bottleneck is strengthened retention. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

37. Retention protocol — Learner studies only favourites

Schedule: begin from the current state—metacognitive bias—and plan the next review only after identifying whether the bottleneck is uneven maintenance. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

38. Retention protocol — Learner reviews everything daily

Schedule: begin from the current state—inefficient ease—and plan the next review only after identifying whether the bottleneck is over-review. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

39. Retention protocol — Learner never reviews old vocabulary

Schedule: begin from the current state—avoidable attrition—and plan the next review only after identifying whether the bottleneck is maintenance failure. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

40. Retention protocol — Learner copies definitions repeatedly

Schedule: begin from the current state—weak retrieval strength—and plan the next review only after identifying whether the bottleneck is passive repetition. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

41. Retention protocol — Learner quizzes before seeing answer

Schedule: begin from the current state—higher effort—and plan the next review only after identifying whether the bottleneck is retrieval practice. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

42. Retention protocol — Learner gets answer wrong then checks immediately

Schedule: begin from the current state—useful correction opportunity—and plan the next review only after identifying whether the bottleneck is failed retrieval with feedback. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

43. Retention protocol — Learner gets answer wrong repeatedly

Schedule: begin from the current state—error risk—and plan the next review only after identifying whether the bottleneck is unstable encoding. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

44. Retention protocol — Learner studies semantically related set together

Schedule: begin from the current state—confusion risk—and plan the next review only after identifying whether the bottleneck is possible interference. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

45. Retention protocol — Learner studies related set with clear contrasts

Schedule: begin from the current state—potentially helpful—and plan the next review only after identifying whether the bottleneck is structured semantic learning. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

46. Retention protocol — Learner sees word in six varied texts

Schedule: begin from the current state—broad retention potential—and plan the next review only after identifying whether the bottleneck is context diversity. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

47. Retention protocol — Learner sees word six times in same paragraph

Schedule: begin from the current state—high familiarity, limited transfer—and plan the next review only after identifying whether the bottleneck is local repetition. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

48. Retention protocol — Learner hears and reads word together

Schedule: begin from the current state—stronger form binding possible—and plan the next review only after identifying whether the bottleneck is multimodal encoding. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

49. Retention protocol — Learner explains word in own words

Schedule: begin from the current state—richer trace—and plan the next review only after identifying whether the bottleneck is generative semantic encoding. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

50. Retention protocol — Learner teaches word to someone else

Schedule: begin from the current state—potentially strong retention—and plan the next review only after identifying whether the bottleneck is retrieval + elaboration. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

51. Retention protocol — Learner uses word in personal example

Schedule: begin from the current state—memorable cue—and plan the next review only after identifying whether the bottleneck is self-referential encoding. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

52. Retention protocol — Learner makes a drawing for concrete word

Schedule: begin from the current state—strong image support—and plan the next review only after identifying whether the bottleneck is dual coding. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

53. Retention protocol — Learner uses picture for abstract word

Schedule: begin from the current state—possible oversimplification—and plan the next review only after identifying whether the bottleneck is weak fit. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

54. Retention protocol — Learner sleeps poorly after study

Schedule: begin from the current state—possible weaker retention—and plan the next review only after identifying whether the bottleneck is consolidation risk. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

55. Retention protocol — Learner crams before test and scores well

Schedule: begin from the current state—retention uncertain—and plan the next review only after identifying whether the bottleneck is short-term performance. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

56. Retention protocol — Learner spaces study and feels slower

Schedule: begin from the current state—potential long-term benefit—and plan the next review only after identifying whether the bottleneck is desirable difficulty. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

57. Retention protocol — Learner stops practice after first success

Schedule: begin from the current state—fragile retention—and plan the next review only after identifying whether the bottleneck is premature criterion. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

58. Retention protocol — Learner continues after mastery

Schedule: begin from the current state—can strengthen retention but costs time—and plan the next review only after identifying whether the bottleneck is overlearning. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

59. Retention protocol — Word occurs naturally every day

Schedule: begin from the current state—automatic spacing—and plan the next review only after identifying whether the bottleneck is environmental maintenance. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

60. Retention protocol — Word occurs once a year

Schedule: begin from the current state—high attrition risk—and plan the next review only after identifying whether the bottleneck is low natural maintenance. A word with a form problem needs different practice from one with a meaning or interference problem.

Cue fading: start with enough support to produce a correct response, then remove translation, first-letter, picture or sentence cues across later sessions. Retention becomes stronger when the learner can reconstruct the word from progressively weaker prompts.

Maintenance rule: after several successful delayed recalls, reduce deliberate review and let authentic exposure carry more of the load. If the word has low natural recurrence but high future value, schedule occasional maintenance rather than daily practice.

23. Frequently asked questions

What is vocabulary retention?

The persistence of lexical knowledge over time.

How is retention different from learning?

Learning can produce immediate performance; retention requires that knowledge remains available after delay.

Does repetition improve retention?

Yes, especially when repetitions are spaced and involve successful retrieval.

Is spacing always better than massing?

Spacing generally supports long-term retention, though massed practice can help initial encoding and easier short-term performance.

Why do I forget words I knew yesterday?

Recent activation can create strong short-term performance before the representation is durable.

Can forgotten words still leave traces?

Yes. Faster relearning, recognition or partial form knowledge can remain.

Does sleep help vocabulary retention?

Sleep is associated with consolidation, but it does not replace repeated learning and retrieval.

Should every word be retained productively?

No. Some low-frequency words only need receptive knowledge.

How should I test retention?

Use delayed recognition and recall, ideally in new contexts and without strong prompts.

What is the simplest rule?

Retrieve successfully, wait, retrieve again, and keep increasing the interval as the word stabilises.

24. Research grounding

Cambridge vocabulary research consistently shows that spacing and retrieval matter for long-term learning. Nakata’s work found benefits from spacing and examined how spacing amount interacts with retention interval. Later work on repeated retrieval tested delayed vocabulary outcomes beyond two weeks. A 2024 Journal of Child Language study found that the number of training sessions in which children successfully retrieved words positively related to later retention. Recent 2026 Applied Psycholinguistics work also shows that spacing and context variability increase processing difficulty and that more difficult practice is not automatically better when demands become excessive.

• Cambridge — Spacing and L2 vocabulary learning
• Cambridge — Repeated retrieval and long-term vocabulary learning
• Cambridge — Successful retrieval sessions and word retention
• Cambridge — Spacing, context variability and vocabulary processing

25. Where to go next in eduKateSG

• Spacing in Vocabulary Learning
• Sleep and Vocabulary Consolidation
• Lexical Consolidation
• Retrieval-Induced Forgetting
• Vocabulary Transfer
• Vocabulary Master Router

26. Final model

Retention is the bridge between learning and future usefulness. A word that performs well only while the lesson is fresh has not yet become durable vocabulary.

The strongest retention system combines accurate encoding, repeated successful retrieval, spacing, consolidation, useful variation and later real-world reuse.

Durable vocabulary is memory that survives distance.