Dale-Chall Score
High-Level Intuition
A score that provides a numeric gauge of the comprehension difficulty that readers come upon when reading a text.
Citation
Implementation Basics
The Dale–Chall readability formula is a readability test that provides a numeric gauge of the comprehension difficulty that readers come upon when reading a text. It uses a list of 3000 words that groups of fourth-grade American students could reliably understand, considering any word not on that list to be difficult.
The formula for calculating the raw score of the Dale–Chall readability score (1948) is given below:
0.1579(difficult words ×100/words) + 0.0496(words/sentences)
Scores range from 0 - 10, details can be found below:
Credits: Wikipedia
Implementation Notes/Caveats
NA
Interpreting the Feature
Scores range from 0 to 10, and can be interpreted as follows:
Score |
Notes |
|---|---|
4.9 |
easily understood by an average 4th-grade student or lower |
5.0-5.9 |
easily understood by an average 5th- or 6th-grade student |
6.0-6.9 |
easily understood by an average 7th- or 8th-grade student |
7.0-7.9 |
easily understood by an average 9th- or 10th-grade student |
8.0-8.9 |
easily understood by an average 11th- or 12th-grade student |
9.0-9.9 |
easily understood by an average college student |