Improvement in Detection of Differential Item Functioning Using a Mixture Item Response Theory Model

Autor/inn/en	Maij-de Meij, Annette M.; Kelderman, Henk; van der Flier, Henk
Titel	Improvement in Detection of Differential Item Functioning Using a Mixture Item Response Theory Model
Quelle	In: Multivariate Behavioral Research, 45 (2010) 6, S.975-999 (25 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0027-3171
Schlagwörter	Test Bias; Item Response Theory; Models; Aptitude Tests; Minority Groups; Immigrants; Foreign Countries; Netherlands; General Aptitude Test Battery + Suchen Sie Ihr Suchwort? Testkritik; Item-Response-Theorie; Analogiemodell; Aptitude test; Eignungsprüfung; Eignungstest; Ethnische Minderheit; Immigrant; Immigrantin; Immigranten; Ausland; Niederlande
Abstract	Usually, methods for detection of differential item functioning (DIF) compare the functioning of items across manifest groups. However, the manifest groups with respect to which the items function differentially may not necessarily coincide with the true source of the bias. It is expected that DIF detection under a model that includes a latent DIF variable is more sensitive to this source of bias. In a simulation study, it is shown that a mixture item response theory model, which includes a latent grouping variable, performs better in identifying DIF items than DIF detection methods using manifest variables only. The difference between manifest and latent DIF detection increases as the correlation between the manifest variable and the true source of the DIF becomes smaller. Different sample sizes, relative group sizes, and significance levels are studied. Finally, an empirical example demonstrates the detection of heterogeneity in a minority sample using a latent grouping variable. Manifest and latent DIF detection methods are applied to a Vocabulary test of the General Aptitude Test Battery (GATB). (Contains 8 tables and 1 figure.) (As Provided).
Anmerkungen	Psychology Press. Available from: Taylor & Francis, Ltd. 325 Chestnut Street Suite 800, Philadelphia, PA 19106. Tel: 800-354-1420; Fax: 215-625-2940; Web site: http://www.tandf.co.uk/journals
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10