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Direct linkCamilli, Gregory; Prowker, Adam; Dossey, John A.; Lindquist, Mary M.; Chiu, Ting-Wei; Vargas, Sadako; de la Torre, Jimmy – Journal of Educational Measurement, 2008
A new method for analyzing differential item functioning is proposed to investigate the relative strengths and weaknesses of multiple groups of examinees. Accordingly, the notion of a conditional measure of difference between two groups (Reference and Focal) is generalized to a conditional variance. The objective of this article is to present and…
Descriptors: Test Bias, National Competency Tests, Grade 4, Difficulty Level
