Abstract
A maximin model for IRT-based test design is proposed. In the model only the relative shape of the target test information function is specified. It serves as a constraint subject to which a linear programming algorithm maximizes the information in the test. In the practice of test construction, several demands as linear constraints in the model. A worked example of a text construction problem with practical constraints is presented. The paper concludes with a discussion of some alternative models of test construction.
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The authors are indebted to Jos J. Adea for suggesting Equation 17 as a Simplification of an earlier version of this constraint. This research was suuorted in part by a grant from the Dutch Organization for Research (NWO) through the Foundation for Psychological and Psychonomic Research in the Netherlands (Psychon).
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van ver Linden, W.J., Boekkooi-Timminga, E. A maximin model for IRT-based test design with practical constraints. Psychometrika 54, 237–247 (1989). https://doi.org/10.1007/BF02294518
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DOI: https://doi.org/10.1007/BF02294518