Why English? | Reporting Readability Studies Through Source Texts, Formula Choice, Text Preparation, Calculators, Scores and Interpretation

ORIENTATION

What this guide owns

Current fact check

The official EQUATOR record identifies researchers, health-information developers, editors and peer reviewers as intended users. CDC describes its Clear Communication Index as a research-based tool with 20 scored items and says readability formulas alone do not assess most characteristics that support clarity and understanding.

Canonical boundary

This article owns reporting of studies that calculate readability of written health information. It does not own general plain-language writing, health-news reporting, accessibility conformance, literacy diagnosis or direct testing of whether a particular person understands instructions.

Worked example

Every chapter returns to a fictional study comparing the readability of public leaflets explaining when families should seek help for an adolescent fever. It is fictional, low-stakes and educational; it does not report a real school, clinical decision or guaranteed outcome.

Warm up with eduKate’s guides to explaining scientific evidence and asking better questions in class.

CHAPTER 1 OF 16

1. Identify the Exact Source Text

Back to contents

Why this move matters

Report title, owner, URL or archive, publication date, version, format and access date for every document.

Reconstruct the exact text that was scored

Report title, owner, URL or archive, publication date, version, format and access date for every document. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: The study archives the exact fever leaflet version assessed on 6 November 2026. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

A preserved text may not match what users actually saw on a responsive page. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Identify the Exact Source Text”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 2 OF 16

2. Define Audience, Purpose and Action

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Why this move matters

State intended readers, language, health context, prior knowledge and the decision or action the material supports.

Reconstruct the exact text that was scored

State intended readers, language, health context, prior knowledge and the decision or action the material supports. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: The leaflet is for parents deciding whether to monitor, call a clinician or seek urgent care. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

An intended audience may differ from actual readers. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Define Audience, Purpose and Action”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 3 OF 16

3. Describe the Document Form and Design

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Why this move matters

Report print, PDF, webpage, portal, app or message format plus headings, lists, tables, visuals, links and navigation.

Reconstruct the exact text that was scored

Report print, PDF, webpage, portal, app or message format plus headings, lists, tables, visuals, links and navigation. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: The webpage includes an alert box and symptom table that are recorded separately from body prose. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

A readability formula may ignore layout and images entirely. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Describe the Document Form and Design”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 4 OF 16

4. State Language, Variety and Translation History

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Why this move matters

Name language, regional variety, source language, translation method and whether formulas were validated for that language.

Reconstruct the exact text that was scored

Name language, regional variety, source language, translation method and whether formulas were validated for that language. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: An English leaflet and its translated version are not scored with an English-only formula as though equivalent. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

Language labels cannot capture every dialect or literacy practice. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “State Language, Variety and Translation History”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 5 OF 16

5. Justify the Readability Formula

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Why this move matters

Name formula and version, explain its inputs and why it fits text type, language and research question.

Reconstruct the exact text that was scored

Name formula and version, explain its inputs and why it fits text type, language and research question. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: The team explains why a sentence-and-word measure is used and why a school-grade label is not treated literally. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

A familiar formula can still be unsuitable. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Justify the Readability Formula”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 6 OF 16

6. Name the Calculator and Settings

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Why this move matters

Report software, website, package, version, access date, locale, tokenisation and configuration.

Reconstruct the exact text that was scored

Report software, website, package, version, access date, locale, tokenisation and configuration. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: The team records the calculator version and checks a manual sample against its counts. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

A hosted tool can change without notice. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Name the Calculator and Settings”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 7 OF 16

7. Show Text Preparation Step by Step

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Why this move matters

Explain removal or retention of titles, bullets, tables, references, URLs, abbreviations, symbols, numbers and repeated navigation.

Reconstruct the exact text that was scored

Explain removal or retention of titles, bullets, tables, references, URLs, abbreviations, symbols, numbers and repeated navigation. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: The study scores body text with and without table labels and reports both. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

Any cleaning rule can alter the communication being studied. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Show Text Preparation Step by Step”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 8 OF 16

8. Define Sentences, Words and Syllables

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Why this move matters

Report how fragments, headings, decimals, hyphens, acronyms, names and medical terms are counted.

Reconstruct the exact text that was scored

Report how fragments, headings, decimals, hyphens, acronyms, names and medical terms are counted. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: A manual audit checks whether “38.5°C” and “A&E” become words or sentence breaks. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

Manual rules may still be subjective. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Define Sentences, Words and Syllables”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 9 OF 16

9. Explain Sampling and Document Selection

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Why this move matters

State population of materials, search, eligibility, date range, sampling, duplicates and missing items.

Reconstruct the exact text that was scored

State population of materials, search, eligibility, date range, sampling, duplicates and missing items. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: All current fever leaflets from named public providers are eligible, not only the easiest to download. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

A complete search of one provider is not a national census. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Explain Sampling and Document Selection”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 10 OF 16

10. Report Score Calculation and Aggregation

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Why this move matters

Give unit-level scores, denominators, rounding, weighting and how multiple pages or documents are combined.

Reconstruct the exact text that was scored

Give unit-level scores, denominators, rounding, weighting and how multiple pages or documents are combined. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: Each leaflet is scored separately before any median is calculated. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

An average can hide one dangerously difficult section. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Report Score Calculation and Aggregation”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 11 OF 16

11. Present Variation and Uncertainty

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Why this move matters

Show distributions, ranges, missingness, sensitivity to formulas or preparation and, when relevant, statistical uncertainty.

Reconstruct the exact text that was scored

Show distributions, ranges, missingness, sensitivity to formulas or preparation and, when relevant, statistical uncertainty. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: Rank order changes when headings are included, so both analyses are reported. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

Sensitivity analysis cannot prove reader understanding. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Present Variation and Uncertainty”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 12 OF 16

12. Avoid Literal Grade-Level Claims

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Why this move matters

Explain what a formula output means on its own scale and avoid claiming that every learner at a named grade can understand the text.

Reconstruct the exact text that was scored

Explain what a formula output means on its own scale and avoid claiming that every learner at a named grade can understand the text. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: A grade-equivalent score is described as a formula output, not an eligibility rule for readers. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

Even careful wording may be misread by downstream summaries. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Avoid Literal Grade-Level Claims”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 13 OF 16

13. Test Comprehension and Action Separately

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Why this move matters

Report interviews, tasks, recall, teach-back or usability testing when claiming understanding or actionability.

Reconstruct the exact text that was scored

Report interviews, tasks, recall, teach-back or usability testing when claiming understanding or actionability. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: Parents locate the urgent warning and explain the next step in their own words. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

Small user tests may not represent everyone. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Test Comprehension and Action Separately”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 14 OF 16

14. Include Accessibility and Information Design

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Why this move matters

Assess contrast, headings, screen-reader order, link labels, table alternatives and other relevant access features with suitable methods.

Reconstruct the exact text that was scored

Assess contrast, headings, screen-reader order, link labels, table alternatives and other relevant access features with suitable methods. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: The study reports whether alert text is available to a screen reader, not just visually prominent. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

Accessibility conformance does not guarantee comprehension. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Include Accessibility and Information Design”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 15 OF 16

15. Revise and Reassess Transparently

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Why this move matters

Document changes, reasons, author review, clinical accuracy checks, new scores and user testing.

Reconstruct the exact text that was scored

Document changes, reasons, author review, clinical accuracy checks, new scores and user testing. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: A long sentence is split only after confirming the clinical condition remains intact. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

A lower score can be achieved by deleting necessary meaning. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Revise and Reassess Transparently”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

CHAPTER 16 OF 16

16. Conclude With a Bounded Readability Claim

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Why this move matters

Tie conclusions to documents, audience, formula, calculator, preparation and complementary testing; avoid equating readability with quality.

Reconstruct the exact text that was scored

Tie conclusions to documents, audience, formula, calculator, preparation and complementary testing; avoid equating readability with quality. Preserve source, version, audience, language, headings, lists, tables, abbreviations and every preparation step before a formula sees the text.

Recalculate one score

Worked example: The leaflets differ on formula scores, while comprehension and clinical accuracy require separate evidence. Use the reported formula, calculator, settings, unit counts and exclusions, then compare the result.

Keep readability separate from understanding

A formula estimates selected textual features. Test comprehension, usability, actionability, accessibility and cultural fit through appropriate additional methods.

Respect the development boundary

Transparent methods cannot make a proxy complete. The Readability Checklist is under development. This article uses its registered scope plus current official communication guidance, not invented final items.

Student, parent and career transfer

Make one evidence card for “Conclude With a Bounded Readability Claim”: source location, plain-language meaning, limit and next question. A parent or teacher can ask for one everyday explanation and one specialist explanation; both must preserve the same conditions. This habit supports health communication, medicine, nursing, pharmacy, public health, editing, information design, accessibility, research methods, journalism and education without promising a grade, admission, funding decision or job.

PRACTICE LAB

Build a Readability Checklist decision trail

Student route

1. Choose one original report inside this guide’s scope.
2. Copy its objective and underline actor, action, context, evidence and intended decision.
3. Draw the specific reasoning chain used in this article.
4. Mark each step reported, inferred, contested or unknown.
5. Rewrite the conclusion so it preserves the narrowest important limitation.

Parent or teacher route

Ask the learner to explain how English helps us turn a readability score into a transparent study of a real text for a real audience—not a verdict produced by a black box twice: once to a classmate and once to a method specialist. Praise a precise correction and a well-stated unknown; both show disciplined attention to evidence.

Early-career route

Create a one-page Readability Checklist audit with source link, date checked, scope, method logic, decisive wording, contrary evidence, limit and next action. A colleague should be able to continue without guessing.

Continue with eduKate’s guides to reading course and career information and giving useful feedback in group projects.

USEFUL NEXT READING

Connect this narrow owner to its neighbour

Read the health-research media reporting guide for a related but different reader job. Return here when the question is specifically how to turn a readability score into a transparent study of a real text for a real audience—not a verdict produced by a black box. This boundary keeps one canonical owner per intent.

For English practice across research, school and career communication, visit the English at work and in public life guide.

FREQUENTLY ASKED QUESTIONS

Questions students and parents often ask

Is the Readability Checklist final?

No. EQUATOR lists it as under development.

Does a low reading-grade score prove clarity?

No. It does not test audience knowledge, design, comprehension or action.

Why name the calculator?

Implementations can count sentences, words and syllables differently.

Should headings be removed?

Report and justify the rule; sensitivity analyses can show its effect.

Can one English formula score another language?

Only when there is evidence it is valid for that language and implementation.

What should accompany readability scores?

Accuracy, accessibility, comprehension, usability and actionability evidence when relevant.