Abstract
In three experiments, different methodologies, measures, and items were employed to address the question of whether, and to what extent, membership in a semantic category is all or none (i.e., absolute) or a matter of degree (i.e., graded).Resemblance theory claims that categorization is based on similarity, and because similarity is graded, category membership may also be graded.Psychological essentialismasserts that categorization is based on the presumption of thecategory essence. Because artifactual (e.g., FURNITURE) and natural (e.g., FRUIT) categories have different sorts of essences, artifacts and natural kinds may be categorized in qualitatively different manners. The results converged on the finding of a robust domain difference in category structure: Artifactual categories were more graded than natural categories. Furthermore, typicality reliably predicted absolute category membership, but failed to predict graded category membership. These results suggest that resemblance theory and psychological essentialism may provide a concerted account of representation and categorization across domains.
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This research was supported in part by a Faculty Research Grant from the University of Georgia Research Foundation.
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Estes, Z. Domain differences in the structure of artifactual and natural categories. Memory & Cognition 31, 199–214 (2003). https://doi.org/10.3758/BF03194379
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DOI: https://doi.org/10.3758/BF03194379