Rule-based extrapolation in perceptual categorization.

Full Abstract

Erickson and Kruschke (1998) provided a demonstration that in certain situations people will classify novel stimuli according to an extrapolated rule, even when the most similar training exemplar is an exception to the rule. This result challenged exemplar models. Nosofsky and Johansen (2000) have called this finding into question by offering an exemplar-based explanation for those data based on the perceptual features of the stimuli. Here, we describe the results of a new experiment that yields results similar to those found previously without the questionable perceptual features:
Participants who learn to classify all the training stimuli have patterns of generalization that indicate a combination of rule and exemplar representation. ATRIUM, a hybrid rule and exemplar model (Erickson & Kruschke, 1998), is shown to account for these data much better than ALCOVE, an exemplar model (Kruschke, 1992). Moreover, four alternate exemplar explanations, including one suggested by Nosofsky and Johansen, cannot account for our new findings.

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Author information

Author/s: Erickson, Michael A (MA); Kruschke, John K (JK);

Affiliation: Center for the Neural Basis of Cognition, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA. erickson(-atsign-)cnbc.cmu.edu

Grants: 1-F32-MH12722 (Agency:United States NIMH) ; 1-R29-MH51572 (Agency:United States NIMH) ; PHS-T32-MH19983 (Agency:United States PHPPO)

Journal and publication information

Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S.

Journal: Psychonomic bulletin & review (Psychon Bull Rev), published in United States. (Language: eng)

Reference: 2002-Mar; vol 9 (issue 1) : pp 160-8

Dates: Created 2002/05/24; Completed 2002/11/19; Revised 2007/11/14;

PMID: 12026949, status: MEDLINE (last retrieval date: 11/6/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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