DIF Detection and Effect Size Measures for Polytomously Scored Items

Autor/inn/en	Kim, Seock-Ho; Cohen, Allan S.; Alagoz, Cigdem; Kim, Sukwoo
Titel	DIF Detection and Effect Size Measures for Polytomously Scored Items
Quelle	In: Journal of Educational Measurement, 44 (2007) 2, S.93-116 (24 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0022-0655
DOI	10.1111/j.1745-3984.2007.00029.x
Schlagwörter	Performance Based Assessment; Performance Tests; Item Response Theory; Test Bias; Test Items; Effect Size + Suchen Sie Ihr Suchwort? Leistungsermittlung; Leistungsbeurteilung; Leistungsmessung; Leistungsüberprüfung; Item-Response-Theorie; Testkritik; Test content; Testaufgabe
Abstract	Data from a large-scale performance assessment (N = 105,731) were analyzed with five differential item functioning (DIF) detection methods for polytomous items to examine the congruence among the DIF detection methods. Two different versions of the item response theory (IRT) model-based likelihood ratio test, the logistic regression likelihood ratio test, the Mantel test, and the generalized Mantel-Haenszel test were compared. Results indicated some agreement among the five DIF detection methods. Because statistical power is a function of the sample size, the DIF detection results from extremely large data sets are not practically useful. As alternatives to the DIF detection methods, four IRT model-based indices of standardized impact and four observed-score indices of standardized impact for polytomous items were obtained and compared with the R[superscript 2] measures of logistic regression. (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10