Why Should We Assess the Goodness-of-Fit of IRT Models?

Autor/in	Maydeu-Olivares, Alberto
Titel	Why Should We Assess the Goodness-of-Fit of IRT Models?
Quelle	In: Measurement: Interdisciplinary Research and Perspectives, 11 (2013) 3, S.127-137 (11 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1536-6367
DOI	10.1080/15366367.2013.841511
Schlagwörter	Stellungnahme; Goodness of Fit; Models; Evaluation Methods; Item Response Theory; Test Theory; Comparative Analysis; Evaluation Research; Evaluation Criteria; Test Items; Item Analysis + Suchen Sie Ihr Suchwort? Analogiemodell; Item-Response-Theorie; Testtheorie; Evaluationsforschung; Test content; Testaufgabe; Itemanalyse
Abstract	In this rejoinder, Maydeu-Olivares states that, in item response theory (IRT) measurement applications, the application of goodness-of-fit (GOF) methods informs researchers of the discrepancy between the model and the data being fitted (the room for improvement). By routinely reporting the GOF of IRT models, together with the substantive results of the application of the fitted model, one will be able to learn "how bad is this fit for this purpose" and establish reasonable fit criteria, which are likely to depend on the intended use of the model. In psychological research, greater attention should be paid to modeling the process used by individuals to respond to test items. GOF methods provide an invaluable tool for this purpose as they often show that the models do not capture well the underlying response process. Maydeu-Olivares contends that by using a common GOF metric in IRT studies, together with the substantive results obtained, researchers will be able to establish cut-off criteria for different purposes. In his view, this method can overcome the danger of being over-zealous about the GOF of IRT models. (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