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Currently there are no brief screening instruments for Diagnostic and Statistical Manual of Mental Disorders (DSM) defined schizotypal personality disorder (SPD). This study reports the development of a brief, 2-minute, 22-item self-report screening instrument, the Schizotypal Personality Questionnaire-Brief (SPQ-B), for SPD. Four independent subject samples provided the basis for test development. The SPQ-B contains a total scale score and three subscales to assess the three main factors of SPD, viz. Cognitive-Perceptual Deficits, Interpersonal Deficits, and Disorganization. Reliability for the scales averaged 0.76, and scale scores correlated significantly with independent clinical ratings of DSM-III-R schizotypal traits (average r = 0.62), indicating criterion validity for the scales. The SPQ-B is recommended for use in large-scale screening for SPD prior to a confirmatory clinical interview and also for dimensional research on the correlates of schizotypal features in the normal population.
Raine et al. (Fri,) studied this question.