A Comparison of the Frequency Estimation and Chained Equipercentile Methods under the Common-Item Nonequivalent Groups Design

Autor/inn/en	Wang, Tianyou; Lee, Won-Chan; Brennan, Robert L.; Kolen, Michael J.
Titel	A Comparison of the Frequency Estimation and Chained Equipercentile Methods under the Common-Item Nonequivalent Groups Design
Quelle	In: Applied Psychological Measurement, 32 (2008) 8, S.632-651 (20 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0146-6216
DOI	10.1177/0146621608314943
Schlagwörter	Equated Scores; Item Response Theory; Simulation; Comparative Analysis; Causal Models; Statistical Distributions + Suchen Sie Ihr Suchwort? Item-Response-Theorie; Simulation program; Simulationsprogramm; Kausalanalyse; Wahrscheinlichkeitsverteilung
Abstract	This article uses simulation to compare two test equating methods under the common-item nonequivalent groups design: the frequency estimation method and the chained equipercentile method. An item response theory model is used to define the true equating criterion, simulate group differences, and generate response data. Three linear equating methods are also included for reference. The results show that when there is substantial group difference, the frequency estimation method has larger bias than the chained equipercentile method. The frequency estimation method, however, almost always has a smaller standard error of equating than the chained equipercentile method. (Contains 6 tables and 8 figures.) (As Provided).
Anmerkungen	SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10