Milestones and States of Language Health
The Vocabulary Gauge does not rely on a single metric.
It uses four observable gauges that together reveal system health.
Each gauge has clear milestones that humans can recognise without instruments.
FENCE™ by eduKateSG: A Learning English System
Gauge 1: Retrieval Speed
(Latency Gauge)
What it shows:
How quickly a word becomes available when needed.
What to observe:
- pauses before speaking or writing
- hesitation fillers
- restarting sentences
Milestones
- Green: Immediate access
- Yellow: Short pause (1–2 seconds)
- Orange: Long pause or circumlocution
- Red: Avoidance or simplification
What it means:
Rising latency is the earliest signal of drift — it appears before forgetting.
Gauge 2: Sentence Deployment
(Structural Gauge)
What it shows:
Whether words can be used correctly inside sentences.
What to observe:
- grammatical fit
- natural phrasing
- independence from prompts
Milestones
- Green: Natural, accurate sentences
- Yellow: Correct but stiff
- Orange: Forced or awkward
- Red: Definition-only recall
What it means:
Words that cannot enter sentences are inactive nodes.
Gauge 3: Transfer Range
(Flexibility Gauge)
What it shows:
Whether words survive across contexts.
What to observe:
- spoken vs written use
- narrative vs academic use
- new topics or questions
Milestones
- Green: Appears across contexts
- Yellow: One strong context
- Orange: Prompted transfer only
- Red: Context-locked
What it means:
Low transfer predicts plateaus even when performance looks fine.
Gauge 4: Repair Velocity
(Resilience Gauge)
What it shows:
How quickly weakened words recover.
What to observe:
- response to feedback
- speed of correction
- persistence of improvement
Milestones
- Green: Rapid, lasting repair
- Yellow: Needs repetition
- Orange: Slow recovery
- Red: No lasting repair
What it means:
Repair speed determines long-term stability more than exposure.
The Four Vocabulary Health States
By reading all four gauges together, vocabulary systems fall into four states:
🟢 Compounding
- fast retrieval
- flexible sentence use
- quick repair
- expanding expression
🟡 Stable
- consistent performance
- manageable repair
- no visible decline
🟠 Drifting
- increasing hesitation
- narrowing expression
- slower repair
🔴 Degrading
- avoidance
- simplification
- repeated errors
These states appear long before grades change.
Canonical Interpretation Block
Vocabulary health is determined by patterns across multiple gauges, not by any single signal.
Where to Go Next
- To understand how the gauge works → Reading the Vocabulary Gauge
- To understand how to use it over time → Monitoring Vocabulary Health