Choice of the RMSD Cutoff for Multigroup-DIF Detection

• In Event: Differential Item Functioning I

Abstract

The root mean square deviation (RMSD) approach is commonly used with an arbitrary cutoff. We investigated the efficacy of various RMSD cutoffs and proposed a model-based approach to select an appropriate cutoff for RMSD for multi-group DIF detection. Researchers can use our proposed model to choose the right RMSD cutoff.

Authors

• Dandan Chen Kaptur, Pearson

• Jinming Zhang, UNIVERSITY OF ILLINOIS AT URBA