Comparison of CRUM and 2PL-CMIRT Models in the Context of DIF

• In Event: Differential Item Functioning I

Abstract

The two-parameter logistic compensatory MIRT model (2PL-CMIRT) and compensatory reparametrized unified model (CRUM) have a lot in common. The purpose of this study was to compare the performance of the Wald and likelihood ratio tests in both the 2PL-CMIRT model and the CRUM in detecting DIF when data were retrofitted.

Authors

• Ahmet Guven, AUGUSTA UNIVERSITY

• Yanyun Yang, Florida State University