Evaluates the lexical readability of any English text against the Common European Framework of Reference for Languages — from A1 (Beginner) to C2 (Proficient) — using a cumulative 90% lexical coverage threshold.
Grounded in Lexical Threshold Theory, Comprehensible Input Theory, and Cognitive Load Theory, the analyser matches every word and multi-word expression against a database of ~12,000 CEFR-aligned entries.
If certain words are not included in the database, apply the following criteria to assess their lexical readability and assign them to the appropriate CEFR level. These criteria describe the typical characteristics of vocabulary at each CEFR level.
To enhance reliability, involve multiple raters (e.g., colleagues). Each rater independently classifies every unlisted word according to its CEFR level. The individual ratings are then aggregated and divided by the total number of raters to obtain a mean score.
Mean score formula:
Where X̄ is the average CEFR rating, Xi is the rating by each rater, and n is the total number of raters.