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Differential Functioning

Module 19: Differential Item Functioning
This ITEM module prepares the reader to use statistical procedures to detect differentially functioning test items.
Module 28: Raju’s Differential Functioning of Items and Tests
This ITEM module explains DFIT and show how this methodology can be utilized in a variety of DIF applications.
Module 29: Differential Step Functioning for Polytomous Items
This ITEM module presents a didactic overview of the DSF framework and provides specific guidance and recommendations on how DSF can be used to enhance the examination of DIF in polytomous items.
Module 41:Latent DIF Analysis using Mixture Item Response Models
This item module provides an introduction to differential item functioning (DIF) analysis using mixture item response models, which involves comparing item profiles across latent groups, instead of manifest groups.