Evaluating the Magnitude of Differential Item Functioning in Polytomous Items
Rebecca Zwick, Dorothy T. Thayer · Journal of Educational and Behavioral Statistics · 1996
Rebecca Zwick, Dorothy T. Thayer, Evaluating the Magnitude of Differential Item Functioning in Polytomous Items, Journal of Educational and Behavioral Statistics, Vol. 21, No. 3 (Autumn, 1996), pp. 187-201