Categorization Behavior in Aging Subjects

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Abstract
Age changes in categorization and conceptual styles were studied using an object-sorting task in 276 subjects representing 7 age groups: 5, 6, 7,19-21, 60-69, 70-79, and 80-89. Significant age effects (p < 01) were found in the analysis of variance for four of six measures; there were no significant sex or interaction effects. Strong quadratic trends were found for number of ungrouped objects, % relationalthematic responses, and % categorical-inferential responses; oldest groups' responses were similar to children's. A linear trend was found for number of groups. There was no significant age effect for category breadth. Use of descriptive-analytic categories by the elderiy was negligible compared to younger subjects.

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