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A Speeded Item Response Model with Gradual Process Change

Published online by Cambridge University Press:  01 January 2025

Yuri Goegebeur ,
Paul De Boeck ,
James A. Wollack  and
Allan S. Cohen
Yuri Goegebeur*
Affiliation:
K.U. Leuven and University of Southern Denmark
Paul De Boeck
Affiliation:
K.U. Leuven
James A. Wollack
Affiliation:
University of Wisconsin
Allan S. Cohen
Affiliation:
University of Georgia
*
Requests for reprints should be sent to Yuri Goegebeur, Department of Psychology, K.U. Leuven, Tiensestraat 102, 3000 Leuven, Belgium. E-mail: yuri.goegebeur@stat.sdu.dk
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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.

Keywords

item response modellocal item dependencetest speededness
Type
Theory and Methods
Information
Psychometrika , Volume 73 , Issue 1 , March 2008 , pp. 65 - 87
Copyright
Copyright © 2007 The Psychometric Society

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Footnotes

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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