Abstract:
:Schizophrenia patients consistently show deficits on tasks of explicit learning and memory. In contrast, their performance on implicit processing tasks often appears to be relatively intact, although most studies have focused on implicit learning of motor skills. This study evaluated implicit learning in 59 medicated schizophrenia outpatients and 43 controls using 2 different cognitive skill tasks. Participants completed a probabilistic classification task to assess procedural habit learning and an artificial grammar task to assess incidental learning of complex rule-based knowledge, as well as an explicit verbal learning and memory task. In addition to performing worse than controls on the explicit learning task, patients showed worse overall performance on the probabilistic classification task, which involves gradual learning through trial-by-trial performance feedback. However, patients and controls showed similar levels of learning on the artificial grammar task, suggesting a preserved ability to acquire complex rule-based knowledge in the absence of performance feedback. Discussion focuses on possible explanations for schizophrenia patients' poor probabilistic classification task performance.
journal_name
Neuropsychologyjournal_title
Neuropsychologyauthors
Horan WP,Green MF,Knowlton BJ,Wynn JK,Mintz J,Nuechterlein KHdoi
10.1037/a0012602subject
Has Abstractpub_date
2008-09-01 00:00:00pages
606-17issue
5eissn
0894-4105issn
1931-1559pii
2008-11707-006journal_volume
22pub_type
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