Lexicon-based Reading Difficulty Prediction

This page is a demonstration of a text classification approach to estimating the reading difficulty of text.

Accuracy generally improves with text length. The software will provide estimates for texts of any length, but a minimum length of 30 words is recommended.

Type or paste your text into the box below and press "Submit" to obtain an estimate of the difficulty of your text.


For more information, on the REAP project, visit reap.cs.cmu.edu.


    This research was sponsored by the National Science Foundation and the U.S. Department of Education's Institute for Education Sciences. Any opinions, findings, conclusions or recommendations expressed on this Web site are those of the author(s), and do not necessarily reflect those of the sponsors.    

Updated on July 24, 2007.