Assessing schizotypal traits in 13-18 year olds: revising the JS']JSS

The Schizotypal Traits Questionnaire for young Adolescents (JSS) was designed by Rawlings and McFarlane (1994) to measure schizotypal traits in adolescents. The original questionnaire contained 74 items, consisting of 7 subscales; physical anhedonia, social anhedonia, paranoid ideation, magical ideation, cognitive disorganisation, perceptual aberration and impulsive nonconformity. The aim of this study was to further investigate the structure of the JSS. Principal components analysis of the 74 items with 492 respondents (ranging in age from 13 to 18) revealed a strong 5 factor structure, consisting of the cognitive, perceptual and social aspects of schizotypy, plus physical anhedonia and impulsive nonconformity. A reliability analysis reduced the number of items to 50. The revised 50-item version of the JSS has a more replicable factor structure, with 5 subscales clearly identified through statistical analysis. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.