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Wang, Wen-Chung1
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Wang, Wen-Chung – 1998
Conventional two-group differential item functioning (DIF) analysis for dichotomous items is extended to factorial DIF analysis for polytomous items where multiple grouping factors with multiple groups in each are jointly analyzed. By adopting the formulation of general linear models, item parameters across all possible groups are treated as a…
Descriptors: Foreign Countries, Identification, Item Bias, Models