Plain English
Plain English is a communication style that employs simple, direct, and familiar words with complete grammatical structure to convey information clearly and accessibly to non-specialist audiences, deliberately avoiding jargon, legalese, and overly complex phrasing.[1][2] The approach emphasizes precision through brevity and logical organization rather than obfuscation, originating from mid-20th-century critiques of convoluted official documents in English-speaking jurisdictions.[3][4] Key principles include structuring content around the reader's needs with short sentences, active voice, common vocabulary, and visual aids like bullet points to facilitate quick comprehension.[5][6] The movement formalized in the 1970s amid pushes to translate dense regulatory and consumer texts into everyday terms, culminating in the 1979 founding of the Plain English Campaign in the United Kingdom by Chrissie Maher to combat "gobbledygook" in public information.[2][3] In finance and law, it advanced through U.S. Securities and Exchange Commission guidelines in the late 1990s mandating simplified prospectuses and contracts, alongside state-level plain language statutes requiring readable consumer agreements to reduce disputes and enhance transparency.[7][8] Adoption has extended to government mandates, such as federal plain writing acts, yielding measurable improvements in public understanding of policies and obligations without sacrificing legal rigor.[9][10]Definition and Principles
Core Principles of Plain English
The core principles of Plain English focus on producing clear, accessible communication that prioritizes reader comprehension over elaborate phrasing or archaic conventions. These principles emerged from advocacy against obfuscating language in legal, governmental, and commercial documents, emphasizing that effective writing conveys information directly so audiences can find, understand, and act on it without confusion. Official guidelines, such as those from the U.S. Securities and Exchange Commission (SEC) and UK government style manuals, stress that Plain English achieves this through deliberate choices in structure, vocabulary, and syntax, rather than rigid formulas, with clarity taking precedence over mere brevity in complex topics.[11][12] Key principles include using short sentences and paragraphs to reduce cognitive demands and improve flow. SEC rules for disclosures mandate short sentences to avoid overwhelming readers, while UK government content principles recommend limiting paragraphs to one main idea for quicker processing.[11][12] Similarly, preferring active voice—where the subject performs the action—enhances directness and accountability, as in "The company issued the report" rather than "The report was issued by the company." This approach, endorsed in federal plain language guides and digital government standards, minimizes ambiguity and passive constructions that obscure responsibility.[13][14] Another cornerstone is selecting everyday words and avoiding jargon, legalese, or unnecessary technical terms unless defined for the audience. Guidelines from the U.S. Department of Labor and SEC advocate concrete, familiar language to ensure broad accessibility, such as replacing "commence" with "start" or "utilize" with "use."[15][11] Writing must also tailor content to the reader's needs, starting with their perspective and using personal pronouns like "you" and "we" to foster engagement, as outlined in federal directives and UK public sector standards.[14][16] Structural elements reinforce these linguistic choices: employ logical organization with topic sentences, headings, bullet points, and tables to present information hierarchically and scannably. U.S. digital guidelines highlight topic sentences for orientation and lists/tables for complex data, preventing dense blocks of text.[13] SEC requirements extend this to visually inviting designs with descriptive headings and avoiding repetitive boilerplate.[11] Collectively, these principles demand testing with target users to verify usability, ensuring documents serve practical purposes rather than ritualistic formality.[5]Readability Standards and Metrics
Readability standards for plain English emphasize structural and lexical simplicity to facilitate broad comprehension, including average sentence lengths of 15 to 20 words, predominance of monosyllabic and disyllabic words (aiming for 70% or more), active voice usage, and avoidance of jargon or unnecessary modifiers. These guidelines derive from empirical observations that longer sentences and complex vocabulary increase cognitive load, reducing understanding rates in diverse audiences. Government and advocacy bodies, such as the UK's Home Office, recommend targeting a reading age of approximately 9 years (equivalent to U.S. grade 4), achievable through such constraints, to ensure accessibility without compromising precision.[17][18] Metrics quantify adherence to these standards via formulas analyzing sentence length (words per sentence) and word complexity (syllables or polysyllables per word), correlating moderately with comprehension tests in controlled studies. The Flesch Reading Ease (FRE) score, one of the earliest and most validated, computes readability as 206.835 - (1.015 × average sentence length) - (84.6 × average syllables per word), yielding values from 0 (highly difficult) to 100 (easiest). For plain English, targets of 60-70 are common, indicating suitability for readers with 13-15 years of education, as higher scores align with faster reading speeds and fewer errors in recall tasks.[19][20][21] The Flesch-Kincaid Grade Level (FKGL) adapts the FRE formula to estimate U.S. school grade equivalents: 0.39 × (words per sentence) + 11.8 × (syllables per word) - 15.59, with plain English standards favoring scores of 8 or below to match general adult literacy levels (around 8th grade). The Gunning Fog Index, developed for business communication, calculates 0.4 × (average words per sentence + percentage of words with three or more syllables), targeting 8-10 for accessible documents; values above 12 signal excessive complexity requiring advanced education.[20][22][23]| Metric | Formula Key Components | Plain English Target | Interpretation |
|---|---|---|---|
| Flesch Reading Ease | Sentence length; syllables per word | 60-70 | Readable by 13-15 year-olds; standard for government and consumer texts[20] |
| Flesch-Kincaid Grade Level | Words per sentence; syllables per word | ≤8 | Matches average U.S. adult proficiency; avoids alienating non-experts[20] |
| Gunning Fog Index | Words per sentence; complex words (%) | 8-10 | Requires high school education at most; used in legal plain language audits[22] |