The relationship between interview-based schizotypal personality dimension scores and the continuous performance test

    Authors

    J. S. Bedwell; V. Kamath;M. T. Compton

    Comments

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    Abstract

    The existing research that has examined cognitive performance in samples with subclinical schizotypal personality features has been largely limited to psychometric self-report questionnaires, which may be biased by distorted self-awareness of symptoms. The present study examined the relationship between performance on a degraded-AX continuous performance test (CPT) and continuous dimension scores created from a structured clinical interview for schizotypal personality disorder (SPD), which reflected both the breadth and severity of schizotypal personality symptoms, in 52 undergraduate students. Only one participant met full diagnostic criteria for SPD. The overall dimension score from the SPD clinical interview showed a positive correlation with both omission (r(s)=.47) and false alarm (r(s)=.41) errors on the CPT. Interpersonal symptoms were positively correlated with omission errors (r(s)=.47), while Disorganized symptoms were positively correlated with false alarm errors (r(s)=.40). Results suggest that higher SPD interview-based dimension scores are associated with lower levels of performance on the CPT, even when examining a relatively subclinical sample of young adults. In contrast, scores from the psychometric Abbreviated Schizotypal Personality Questionnaire in the same sample did not correlate with accuracy measures on the CPT, suggesting that the interview-based measure of schizotypal personality may have a stronger relationship with CPT accuracy. Findings also add to a growing literature suggesting that Interpersonal SPD symptoms are primarily related to omission errors, while Disorganized SPD symptoms are primarily related to false alarm errors. (C) 2008 Elsevier B.V. All rights reserved.

    Journal Title

    Schizophrenia Research

    Volume

    108

    Issue/Number

    1-3

    Publication Date

    1-1-2009

    Document Type

    Article

    First Page

    158

    Last Page

    162

    WOS Identifier

    WOS:000264506500020

    ISSN

    0920-9964

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