A novel technique of detecting DIF in items using z-score based on IRT
model
Ankita Dey
National Institute of Tuberculosis and Respiratory Diseases, India, National Institute of Tuberculosis and Respiratory Diseases, India
Corresponding Author:[email protected]
Author ProfileAbstract
A novel technique of detecting DIF in items using z-score based on IRT
model. A simple technique based on z-score is proposed and derived for
Rasch Model and also compared with traditional DIF detection methods.
The data set used for application is the State Level Achievement Survey
data set from West Bengal, India. Binary responses on 40-item tests of
12518 examinees are taken.
