Impairments in Perceptual Competency and Maintenance on a Visual Delayed Match-to-Sample Test in First-Episode Schizophrenia
Author(s) -
Todd Lencz,
Robert M. Bilder,
Eli Turkel,
Robert Goldman,
Delbert G. Robinson,
John M. Kane,
Jeffrey A. Lieberman
Publication year - 2003
Publication title -
archives of general psychiatry
Language(s) - English
Resource type - Journals
eISSN - 1538-3636
pISSN - 0003-990X
DOI - 10.1001/archpsyc.60.3.238
Subject(s) - psychology , audiology , stimulus (psychology) , perception , schizoaffective disorder , abnormality , schizophrenia (object oriented programming) , visual perception , developmental psychology , cognitive psychology , psychosis , psychiatry , neuroscience , medicine
Deficits in working memory (WM) have been reported in patients with schizophrenia, but WM is a complex construct dependent on several subprocesses, including input representation (perceptual competency) and holding stimuli on-line (maintenance). A visual delayed match-to-sample task (DMST) was developed to isolate perceptual competency from maintenance during delays. It was hypothesized that patients in the first episode of schizophrenia would exhibit dissociable deficits in both WM domains.
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