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Comparison of Mantel–Haenszel with IRT procedures for DIF detection and effect size estimation for dichotomous items
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20

August 2024

2024/2025

A+
D ifferential item functioning (DIF) is a statistical term that describes a condition when the item response is dependent not only on the ability level of the subject but also on the value of some additional group membership variable. If DIF is present verification plays an important role in psychometric analysis of a test and is closely related to the problem of validity. Let Ui denote response to item i, θ be the level of ability that the test measures and G be the group ...
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