Schizotypal Personality Questionnaire-Brief: Factor structure and convergent validity in inpatient adolescents

Seth R. Axelrod, Yale University School of Medicine
Carlos M. Grilo, Yale University School of Medicine
Charles A. Sanislow, Yale University School of Medicine
Thomas H. McGlashan, Yale University School of Medicine

Abstract

We examined the internal consistency, factor structure, and validity of the Schizotypal Personality Questionnaire-Brief (SPQ-B). Two hundred thirty-seven psychiatrically hospitalized adolescents were administered the SPQ-B and a battery of well-established self-report instruments. The SPQ-B demonstrated adequate internal consistency. Exploratory factor analysis provided mixed support for the SPQ-B 3-factor structure of interpersonal deficits, cognitive-perceptual deficits, and disorganization. The Interpersonal and Cognitive-Perceptual subscales demonstrated convergent and discriminant relationships with other measures of interpersonal impairment and cognitive abnormalities. We concluded that the SPQ-B is a promising measure for evaluating schizotypal personality disorder features, specifically interpersonal and cognitiveperceptual deficits, with adolescent psychiatric inpatients.