Modeling the Effects of Person Group Factors on Discrimination

Autor/in	Humphry, Stephen M.
Titel	Modeling the Effects of Person Group Factors on Discrimination
Quelle	In: Educational and Psychological Measurement, 70 (2010) 2, S.215-231 (17 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0013-1644
DOI	10.1177/0013164409344553
Schlagwörter	Discriminant Analysis; Models; Simulation; Reading Tests; Item Response Theory; Influences; Goodness of Fit; Comparative Analysis; Foreign Countries; Australia + Suchen Sie Ihr Suchwort? Diskriminanzanalyse; Analogiemodell; Simulation program; Simulationsprogramm; Lesetest; Item-Response-Theorie; Influence; Einfluss; Einflussfaktor; Ausland; Australien
Abstract	Discrimination has traditionally been parameterized for items but not other empirical factors. Consequently, if person factors affect discrimination they cause misfit. However, by explicitly formulating the relationship between discrimination and the unit of a metric, it is possible to parameterize discrimination for person groups. This article applies the Rasch model with a person group discrimination parameter to demonstrate the empirical effect of a person group factor on the degree of discrimination. The model is applied to the responses of students in different grades of schooling to a reading test, resulting in improved equating and fit of the data to the model. A simulation study confirms the efficacy of the model and tests of fit. Applied implications are discussed. (Contains 4 tables and 6 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10