The "benefits" of distractability: Mechanisms underlying increased Stroop effects in schizophrenia

Barch, Deanna M. and Carter, Cameron S. and Hachten, Paul C. and Usher, Marius and Cohen, Jonathan D. (1999) The "benefits" of distractability: Mechanisms underlying increased Stroop effects in schizophrenia. Schizophrenia Bulletin, 25 (4). pp. 749-762. ISSN 0586-7614. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Recent studies of selective attention in schizophrenia patients suggest a particular pattern of single-trial Stroop performance: increased facilitation but not interference in reaction times (RTs), combined with increased error interference. Our Stroop task analysis suggests that this pattern can be explained by a selective attention deficit if one accounts for (1) performance in the congruent condition; (2) the nature of the neutral stimulus; (3) the relationship between accuracy and RT; and (4) response set effects, To test these hypotheses, we examined Stroop performance in 40 DSM-IV schizophrenia patients and 20 healthy control subjects, using a range of neutral stimuli (color patches, noncolor words, color words not in the response set), The findings confirmed several of our predictions and the results were consistent with the hypothesis that abnormal Stroop performance in schizophrenia reflects a failure to adequately attend to the task-appropriate stimulus dimension (color), This inattention affects both the congruent and incongruent conditions and multiple points in the information processing pathway.

Item Type: Article
Uncontrolled keywords: Schizophrenia, inhibition, Stroop. Schizophrenia Bulletin
Subjects: R Medicine
Divisions: Faculties > University wide - Teaching/Research Groups > Centre for Cognitive Neuroscience and Cognitive Systems
Depositing User: M. Nasiriavanaki
Date Deposited: 23 Jul 2009 07:25
Last Modified: 02 May 2014 10:42
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