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.
journal_name
Neuropsychologyjournal_title
Neuropsychologyauthors
Ashby FG,Noble S,Filoteo JV,Waldron EM,Ell SWsubject
Has Abstractpub_date
2003-01-01 00:00:00pages
115-24issue
1eissn
0894-4105issn
1931-1559journal_volume
17pub_type
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