Effects of Ignoring Item Interaction on Item Parameter Estimation and Detection of Interacting Items

Autor/inn/en	Chen, Cheng-Te; Wang, Wen-Chung
Titel	Effects of Ignoring Item Interaction on Item Parameter Estimation and Detection of Interacting Items
Quelle	In: Applied Psychological Measurement, 31 (2007) 5, S.388-411 (24 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0146-6216
DOI	10.1177/0146621606297309
Schlagwörter	Models; Item Response Theory; Simulation; Generalization; Equations (Mathematics); Data Analysis + Suchen Sie Ihr Suchwort? Analogiemodell; Item-Response-Theorie; Simulation program; Simulationsprogramm; Equations; Mathematics; Gleichungslehre; Auswertung
Abstract	This study explores the effects of ignoring item interaction on item parameter estimation and the efficiency of using the local dependence index Q[subscript 3] and the SAS NLMIXED procedure to detect item interaction under the three-parameter logistic model and the generalized partial credit model. Through simulations, it was found that ignoring positive item interaction led to overestimation for the discrimination parameters, underestimation for the difficulty parameters, and a Q[subscript 3] much smaller than zero. As the guessing parameters approached zero, the overestimation for the discrimination parameters became more serious. In contrast, ignoring negative item interaction led to underestimation for the discrimination parameters, overestimation for the difficulty parameters, and a Q[subscript 3] much larger than zero. As the guessing parameters approached zero, the underestimation for the discrimination parameters became less serious. A modification of posterior predictive p value for Q[subscript 3] was proposed to detect item interaction and was found to work very well. Direct modeling of item interaction using NLMIXED was demonstrated. (Contains 9 tables and 1 figure.) (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10