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| Research article summary (published 30 Dec 2002): |
Category learning deficits in Parkinson's disease.
Full Abstract
Sixteen patients with Parkinson's disease (PD), 15 older controls (OCs), and 109 younger controls (YCs) were compared in 2 category-learning tasks. Participants attempted to assign colored geometric figures to 1 of 2 categories. In rule-based tasks, category membership was defined by an explicit rule that was easy to verbalize, whereas in information-integration tasks, there was no salient verbal rule and accuracy was maximized only if information from 3 stimulus components was integrated at some predecisional stage. The YCs performed the best on both tasks. The PD patients were highly impaired compared with the OCs, in the rule-based categorization task but were not different from the OCs in the information-integration task. These results support the hypothesis that learning in these 2 tasks is mediated by functionally separate systems.
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Author information
Author/s: Ashby, F Gregory (FG); Noble, Sharon (S); Filoteo, J Vincent (JV); Waldron, Elliot M (EM); Ell, Shawn W (SW);
Affiliation: Department of Psychology, University of California, Santa Barbara, 93106, USA. ashby(-atsign-)psych.ucsb.edu
Journal and publication information
Publication Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.
Journal: Neuropsychology (Neuropsychology), published in United States. (Language: eng)
Reference: 2003-Jan; vol 17 (issue 1) : pp 115-24
Dates: Created 2003/02/24; Completed 2003/04/11; Revised 2006/11/15;
PMID: 12597080, 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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