The Study of Psychometric Properties of Schizotypal Personality Questionnaire-Brief (SPQ-B)

The different scales for assessing schizotypal traits were developed fromdifferent perspectives. these scales confined themselves only to certain aspects(syndromes) of the schizotypal personality, and they do not represent the ninefeatures of schizotypal personality outlined in dsm-iv-tr. in contrast theschizotypal personality questionnaire and its brief version are symptomorientedand more comprehensive scales based on clinical features ofschizotypal personality disorder described by the dsm. the aim of this studywas to investigate the psychometric properties of the schizotypal personalityquestionnaire-brief (spq-b). the current study was conducted in survey andcross sectional as well as ex-post facto research context. in order to study thereliability and validity of the spq-b, its items were translated into persian andthen retranslated into english. a group of 402 normal participants (160 males& 242 females) from colleges of allameh tabatabaie university took part inthis research. principal component analysis with promax rotation for spq-bextracted three factors which were labeled cognitive perceptual deficits,interpersonal deficits, and disorganization factors, respectively, and accountedfor 32.64% of the variance. however, for this scale two other types of validity(convergent validity & intercorrelations between subscales and the wholescale) and two reliabilities (test retest & internal consistency) were reported.based on these results, it was concluded that spq-b possesses good validityand reliability in iranian population and it can be used, as a valid measure, inpsychological and psychiatric research. the results of this study also supportprior findings ofgender differences in schizotype scores.