Coh-Metrix Model 3

General Description

Coh-Metrix Model 3, recommended for current use, is an ensemble (formed by averaging predicted quality scores) of three genre-specific models, detailed below.

• CohMetrix Model 3narr
• CohMetrix Model 3exp
• CohMetrix Model 3per

Full details of each sub-model are available in the links above.

The models were trained on Coh-Metrix scores from 15 min narrative, expository, and persuasive writing samples from students in Grades 2-5 to predict holistic writing quality on the samples (theta scores calculated from paired comparisons).

More details on the sample will be provided once peer review is complete on the main study using this model.