Does practice in category learning increase rule use or exemplar use—or both?
Category
Journal Article
Authors
Thibaut, J.P., Gelaes, S., Murphy, G.L.
Year
2018
Title
Does practice in category learning increase rule use or exemplar use—or both?
Journal / book / conference
Memory & Cognition
Abstract
Categorization research has demonstrated the use of both rules and remembered exemplars in classification, although there is disagreement over whether learners shift from one to the other or use both strategies simultaneously. Theoretical arguments can motivate predictions for both rule use and exemplar use increasing with more practice. We describe a single large experiment (n = 190) that manipulated the number of training items (category size), the number of presentations of each training item, and the similarity between the training and the transfer stimuli in order to discover when rules and exemplars are most likely to be used. Results showed that rules and exemplars both influenced classification and that exemplars were used more often with smaller categories, with more training on items, and when test items were similar to training items. There was no consistent evidence of a shift from rule-based to exemplar-based categorization with more learning. Importantly, we found a number of conditions in which rules and exemplars were both used, even within individual participants. We discuss our results in terms of hybrid models of classification.
Volume
46
Pages
530-543
Keywords
categorization, Category learning, Concepts, Rules, Exemplars, Abstraction