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Oliveri, Maria Elena; Ercikan, Kadriye; Zumbo, Bruno – International Journal of Testing, 2013
In this study, we investigated differential item functioning (DIF) and its sources using a latent class (LC) modeling approach. Potential sources of LC DIF related to instruction and teacher-related variables were investigated using substantive and three statistical approaches: descriptive discriminant function, multinomial logistic regression,…
Descriptors: Test Bias, Test Items, Multivariate Analysis, Discriminant Analysis