A Speeded Item Response Model with Gradual Process Change |
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| Authors: | Yuri Goegebeur Paul De Boeck James A. Wollack Allan S. Cohen |
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| Affiliation: | 1.Department of Psychology,K.U. Leuven,Leuven,Belgium;2.Department of Statistics,University of Southern Denmark,Odense C,Denmark;3.School of Education, Testing and Evaluation Services,University of Wisconsin-Madison,Madison,USA;4.Department of Educational Psychology,University of Georgia,Athens,USA |
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| Abstract: | An item response theory model for dealing with test speededness is proposed. The model consists of two random processes, a problem solving process and a random guessing process, with the random guessing gradually taking over from the problem solving process. The involved change point and change rate are considered random parameters in order to model examinee differences in both respects. The proposed model is evaluated on simulated data and in a case study. The research reported in this paper was supported by IAP P5/24 and GOA/2005/04, both awarded to Paul De Boeck and Iven Van Mechelen, and by IAP P6/03, awarded to Iven Van Mechelen. Yuri Goegebeur’s research was supported by a grant of the Danish Natural Science Research Council. |
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| Keywords: | item response model local item dependence test speededness |
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