In this paper it is shown that differential item functioning can be evaluated using the Lagrange multiplier test or C. R. Rao's efficient score test. The test is presented in the framework of a number of item response theory (IRT) models such as the Rasch model, the one-parameter logistic model, the two-parameter logistic model, the generalized partial credit model, and the nominal response model. However, the paradigm for detection of differential item functioning presented here applies to other IRT models. The proposed method is based on a test statistic with a known asymptotic distribution. Two examples are given, one using simulated data and one using real data from 1,000 boys and 1,000 girls taking a Dutch secondary examination.
|Place of Publication||Enschede|
|Publisher||Universiteit Twente, Faculteit Toegepaste Onderwijskunde|
|Number of pages||40|
|Publication status||Published - 1996|
|Name||OMD research report|
|Publisher||University of Twente, Faculty of Educational Science and Technology|
- Item Response Theory
- Secondary Education
- Test Items
- Item Bias
- Foreign Countries
- Secondary School Students
Glas, C. A. W. (1996). Detection of differential item functioning using Lagrange multiplier tests. (OMD research report; No. 96-02). Enschede: Universiteit Twente, Faculteit Toegepaste Onderwijskunde.