Accuracy of DIF Estimates and Power in Unbalanced Designs Using the Mantel-Haenszel DIF Detection Procedure

Autor/inn/en	Paek, Insu; Guo, Hongwen
Titel	Accuracy of DIF Estimates and Power in Unbalanced Designs Using the Mantel-Haenszel DIF Detection Procedure
Quelle	In: Applied Psychological Measurement, 35 (2011) 7, S.518-535 (18 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0146-6216
DOI	10.1177/0146621611420559
Schlagwörter	Test Bias; Accuracy; Reference Groups; Investigations; Testing Programs; Statistics; Sample Size; Computation; Methods; Research Methodology + Suchen Sie Ihr Suchwort? Testkritik; Reference group; Bezugsgruppe; Untersuchung; Statistik; Method; Methode; Research method; Forschungsmethode
Abstract	This study examined how much improvement was attainable with respect to accuracy of differential item functioning (DIF) measures and DIF detection rates in the Mantel-Haenszel procedure when employing focal and reference groups with notably unbalanced sample sizes where the focal group has a fixed small sample which does not satisfy the minimum DIF sample size requirement specified by the testing programs, while the reference group sample size far exceeds the minimum requirement. Results showed equivalent or better results with such unbalanced but large samples than with some of the currently used minimum DIF sample size conditions. DIF investigation, therefore, does not necessarily need to cease when the focal group does not meet the minimum sample size requirement. Some analytic explanations and guidelines for DIF investigations with unbalanced sample sizes are also provided. (Contains 6 tables and 1 note.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10