ERIC Number: ED424236
Record Type: Non-Journal
Publication Date: 1996-Oct
Reference Count: N/A
Detection of Differential Item Functioning Using Lagrange Multiplier Tests. Research Report 96-02.
Glas, Cees A. W.
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. (Contains 6 tables and 44 references.) (Author/SLD)
Descriptors: Foreign Countries, Item Bias, Item Response Theory, Scores, Secondary Education, Secondary School Students, Simulation, Test Items
Faculty of Educational Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
Publication Type: Reports - Evaluative
Education Level: N/A
Authoring Institution: Twente Univ., Enschede (Netherlands). Faculty of Educational Science and Technology.
Identifiers - Location: Netherlands