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Dissimilarity is used as evidence of category membership in multidimensional perceptual categorization: a test of the similarity-dissimilarity generalized context model

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Stewart, Neil, 1974- and Morin, Caroline. (2007) Dissimilarity is used as evidence of category membership in multidimensional perceptual categorization: a test of the similarity-dissimilarity generalized context model. Quarterly Journal of Experimental Psychology, Vol.60 (No.10). pp. 1337-1346. ISSN 1747-0218

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Official URL: http://dx.doi.org/10.1080/17470210701480444

Abstract

In exemplar models of categorization, the similarity between an exemplar and category members constitutes evidence that the exemplar belongs to the category. We test the possibility that the dissimilarity to members of competing categories also contributes to this evidence. Data were collected from two 2-dimensional perceptual categorization experiments, one with lines varying in orientation and length and the other with coloured patches varying in saturation and brightness. Model fits of the similarity-dissimilarity generalized context model were used to compare a model where only similarity was used with a model where both similarity and dissimilarity were used. For the majority of participants the similarity-dissimilarity model provided both a significantly better fit and better generalization, suggesting that people do also use dissimilarity as evidence.

Item Type:	Journal Article
Subjects:	B Philosophy. Psychology. Religion > BF Psychology
Divisions:	Faculty of Science > Psychology
Library of Congress Subject Headings (LCSH):	Optical pattern recognition, Visual discrimination, Psychology -- Experiments, Categorization (Psychology)
Journal or Publication Title:	Quarterly Journal of Experimental Psychology
Publisher:	Taylor & Francis
ISSN:	1747-0218
Date:	9 August 2007
Volume:	Vol.60
Number:	No.10
Number of Pages:	10
Page Range:	pp. 1337-1346
Identification Number:	10.1080/17470210701480444
Status:	Peer Reviewed
Access rights to Published version:	Open Access
Funder:	Economic and Social Research Council (Great Britain) (ESRC)
Grant number:	R000239351 (ESRC), RES-000-23-1372 (ESRC), RES-00023-1038 (ESRC)
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URI:	http://wrap.warwick.ac.uk/id/eprint/604