How to Treat Omitted Responses in Rasch Model-Based Equating

Autor/in	Shin, Seon-Hi
Titel	How to Treat Omitted Responses in Rasch Model-Based Equating
Quelle	In: Practical Assessment, Research & Evaluation, 14 (2009) 1, (8 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1531-7714
Schlagwörter	True Scores; Equated Scores; Item Response Theory; Coding; Monte Carlo Methods; Comparative Analysis; Sample Size + Suchen Sie Ihr Suchwort? Item-Response-Theorie; Codierung; Programmierung; Monte-Carlo-Methode
Abstract	This study investigated the impact of the coding scheme on IRT-based true score equating under a common-item nonequivalent groups design. Two different coding schemes under investigation were carried out by assigning either a zero or a blank to a missing item response in the equating data. The investigation involved a comparison study using actual large scale data and then Monte Carlo simulations for a systematic inspection on the topic. The recommendations on the basis of the findings of the study were made to treat omitted responses as not-administered rather than as wrong, and use a large sample size to ensure the accuracy of the screening tools such as the displacement index and the robust-"z" statistic during equating. (Contains 4 figures and 1 table.) (As Provided).
Anmerkungen	Dr. Lawrence M. Rudner. e-mail: editor@pareonline.net; Web site: http://pareonline.net
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10