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A Psychometric Analysis of the Social-Interpersonal and Cognitive-Perceptual Items for the Schizotypal Personality Disorder

Thomas A. Widiger, PhD; Allen Frances, MD; Timothy J. Trull, MA
Arch Gen Psychiatry. 1987;44(8):741-745. doi:10.1001/archpsyc.1987.01800200069010.
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• Because the social-interpersonal symptoms of schizotypal personality disorder have been more useful than the cognitive-perceptual in identifying the biological relatives of schizophrenics, it has been recommended that the schizotypal DSM-III-R (or DSM-IV) criteria be revised to emphasize the social-interpersonal items. This study determined whether the social-interpersonal items would be more efficient than the cognitive-perceptual in diagnosing schizotypal personality disorder in patients presenting to a clinical setting. In contrast to studies conducted in nonclinical samples, we found that the cognitive-perceptual items were equally and at times more important than the social-interpersonal items to the diagnosis of patients with schizotypal personality disorder. We demonstrate that the value of an item depends in part on the particular differential diagnosis at issue.

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