Effects of Unequal Ability Variances on the Performance of Logistic Regression, Mantel-Haenszel, SIBTEST IRT, and IRT Likelihood Ratio for DIF Detection

Autor/inn/en	Pei, Lai Kwan; Li, Jun
Titel	Effects of Unequal Ability Variances on the Performance of Logistic Regression, Mantel-Haenszel, SIBTEST IRT, and IRT Likelihood Ratio for DIF Detection
Quelle	In: Applied Psychological Measurement, 34 (2010) 6, S.453-456 (4 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0146-6216
DOI	10.1177/0146621610367789
Schlagwörter	Test Bias; Item Response Theory; Regression (Statistics); Statistical Analysis; Maximum Likelihood Statistics; Ability; Differences + Suchen Sie Ihr Suchwort? Testkritik; Item-Response-Theorie; Regression; Regressionsanalyse; Statistische Analyse; Fähigkeit; Fertigkeit; Unterscheiden
Abstract	Differential item functioning (DIF) of items has become an important issue in test fairness and equity in large-scale assessments. DIF occurs when subgroups of test takers have equal trait levels but differ in their probabilities of a correct response. DIF items may threaten the validity of test scores for subgroups and can mislead researchers about group differences. Thus, it is critical to identify DIF items. Numerous parametric and nonparametric methods have been proposed for detecting DIF, and a lot of simulation studies have been done to examine the performance of these methods to flag DIF items. However, among these studies, there is little attention to the effects on DIF detection methods of the difference in ability variance between two groups. Thus, the aim of this study is to examine how the difference in ability variance between reference and focal groups affects four commonly used DIF detection methods: (a) logistic regression modeling; (b) Mantel-Haenszel chi-square (MH test); (c) simultaneous item bias test (SIBTEST); and (d) likelihood ratio test. (Contains 2 tables.) (ERIC).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10