On the nature of implicit categorization |
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Authors: | Ashby F G Waldron E M |
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Affiliation: | (1) Department of Psychological and Brain Sciences, Indiana University, 47405 Bloomington, IN |
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Abstract: | Current categorization models disagree about whether people make a priori assumptions about the structure of unfamiliar categories. Data from two experiments provided strong evidence that people do not make such assumptions. These results rule out prototype models and many decision bound models of categorization. We review previously published neuropsychological results that favor the assumption that category learning relies on a procedural-memory-based system, rather than on an instance- based system (as is assumed by exemplar models). On the basis of these results, a new categorylearning model is proposed that makes no a priori assumptions about category structure and that relies on procedural learning and memory. |
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