Detecting Differential Item Functioning Using Logistic Regression Procedures |
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| Authors: | Hariharan Swaminathan H Jane Rogers |
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| Institution: | University of Massachusetts;Teachers College, Columbia University |
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| Abstract: | A logistic regression model for characterizing differential item functioning (DIF) between two groups is presented. A distinction is drawn between uniform and nonuniform DIF in terms of the parameters of the model. A statistic for testing the hypothesis of no DIF is developed. Through simulation studies, it is shown that the logistic regression procedure is more powerful than the Mantel-Haenszel procedure for detecting nonuniform DIF and as powerful in detecting uniform DIF. |
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