A model for repeat trial product tests |
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| Authors: | Bruce Buchanan |
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| Affiliation: | (1) Marketing Department, New York University, USA |
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| Abstract: | A non-forced choice model is developed that describes subject behavior on repeat trial discrimination tests of the  pick 1 ofk form. The model is developed from the Dirichlet distribution, and it allows for the derivation of individual true scores and of sampling properties for various constructs of interest. These results permit the analysis and comparison of test designs. The model is applied to issues such as forced vs. non-forced choice formats, the best number of alternatives at a choice point, and the selection of expert panels. |
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| Keywords: | discrimination testing Dirichlet distribution random guessing |
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