DFIT

Author: Nambury S. Raju, T. Chris Oshima & Allen H. Wolach
Contact: https://cran.r-project.org/web/packages/DFIT/
Description: DFIT8 is a powerful Windows application designed to perform differential item functioning (DIF) analyses utilizing the DFIT framework originally proposed by Raju, van der Linden, & Fleer (1995). DFIT is an advanced approach based on item response theory (IRT) that compares the item response functions for groups of examinees to determine if a test item is performing significantly different for one group.
Analyses: Multilevel Data
System Requirements: Windows or Mac
Measurement Model: IRT/Rasch
License Type: Open-Source (R)
Documentation: PDF manual