Intuitive Simplification
Intuitive simplification is the dominant industry practice of writing or rewriting texts for second-language readers based on the author's judgement of what learners at a given level can handle, rather than by applying a numerical readability formula. Graded readers, ELT coursebook passages, and levelled news services almost all rely on it. The author works from a wordlist and structural syllabus, but moment-by-moment decisions about which clause to break, which referent to make explicit, and which item to gloss sit in the writer's intuition.
What Authors Actually Do
Crossley, Allen, and McNamara (2011) assembled a corpus of texts intuitively simplified at advanced, intermediate, and beginner levels, then ran traditional readability formulas (Flesch–Kincaid, Dale–Chall) and the Coh-Metrix L2 Reading Index, built on psycholinguistic and cognitive models of reading. Coh-Metrix, which weights word frequency, syntactic similarity, and content-word overlap, classified the levels far more accurately than the surface-feature formulas. When authors simplify by feel, they track the same lexical and cohesive variables that read-time research has shown to predict L2 processing difficulty.
Why This Matters
The finding cuts two ways. Author intuition is more principled than skeptics assume; experienced graders are sensitive to referential cohesion, lexical co-occurrence, and predicate density, features surface formulas ignore. At the same time, readability formulas remain inadequate as L2 design tools: a text scoring at Flesch–Kincaid grade 4 may still load heavily on cohesion gaps or low-frequency academic vocabulary. Crossley, Allen, and McNamara (2012) extended the argument: rather than treat simplification as deviation from authentic text, the field should recognise it as comprehensible-input design that approximates what cognitive readability research recommends.
Implications for Materials Writers
Treat published readability scores as a coarse filter, not a target. The features that distinguish a usable B1 text from an unusable one (pronoun chains a learner can resolve, recurring content words, propositions sequenced without ellipsis) do not appear in Flesch–Kincaid output but do show up in Coh-Metrix indices and in what a careful grader notices on a fourth read. Allen's (2009) corpus work showed intuitive simplifiers reliably reduce embedded and non-restrictive relative clauses, a pattern formulas cannot detect.
References
- Allen, D. (2009). A study of the role of relative clauses in the simplification of news texts for learners of English. System, 37(4), 585–599.
- Crossley, S. A., Allen, D. B., & McNamara, D. S. (2011). Text readability and intuitive simplification: A comparison of readability formulas. Reading in a Foreign Language, 23(1), 84–101.
- Crossley, S. A., Allen, D. B., & McNamara, D. S. (2012). Text simplification and comprehensible input: A case for an intuitive approach. Language Teaching Research, 16(1), 89–108.