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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.