title: Dimensional Structure and Measurement Invariance of the Schizotypal Personality Questionnaire - Brief Revised (SPQ-BR) Scores Across American and Spanish Samples.
abstract: The main goal of the present study was to test the measurement equivalence of the Schizotypal Personality Questionnaire - Brief Revised (SPQ-BR) scores in a large sample of Spanish and American non-clinical young adults. The sample was made up of 5,625 young adults (M = 19.65 years; SD = 2.53; 38.5% males). Study of the internal structure, using confirmatory factor analysis (CFA), revealed that SPQ-BR items were grouped in a theoretical internal structure of nine first-order factors. Moreover, three or four second-order factor and bifactor models showed adequate goodness-of-fit indices. Multigroup CFA showed that the nine lower-order factor models of the SPQ-BR had configural and weak measurement invariance and partial strong measurement invariance across country. The reliability of the SPQ-BR scores, estimated with omega, ranged from 0.67 to 0.91. Using the item response theory framework, the SPQ-BR provides more accurate information at the medium and high end of the latent trait. Statistically significant differences were found in the raw scores of the SPQ-BR subscales and dimensions across samples. The American group scored higher than the Spanish group in all SPQ-BR domains except Ideas of Reference and Suspiciousness. The finding of comparable factor structure in cross-cultural samples would lend further support to the continuum model of psychosis spectrum disorders. In addition, these results provide new information about the factor structure of schizotypal traits and support the validity and utility of this measure in cross-cultural research.
authors.affiliation: Department of Educational Sciences, University of La Rioja, La Rioja, Spain.|Prevention Program for Psychosis (P3), Oviedo, Spain.|Center for Biomedical Research in the Mental Health Network (CIBERSAM), Oviedo, Spain.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Fonseca-Pedrero
authors.affiliation: Department of Psychology, Louisiana State University, Baton Rouge, Louisiana.
authors.forename: Alex
authors.initials: A
authors.lastname: Cohen
authors.affiliation: Department of Educational Sciences, University of La Rioja, La Rioja, Spain.|Center for Biomedical Research in the Mental Health Network (CIBERSAM), Oviedo, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Ortuño-Sierra
authors.affiliation: Department of Educational Sciences, University of La Rioja, La Rioja, Spain.
authors.forename: Alicia Pérez
authors.initials: AP
authors.lastname: de Álbeniz
authors.affiliation: Department of Psychology, University of Oviedo, Spain.
authors.forename: José
authors.initials: J
authors.lastname: Muñiz
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D011594:Psychometrics / Q000379:methods*; D015203:Reproducibility of Results; D012569:Schizotypal Personality Disorder / Q000175:diagnosis* / Q000523:psychology*; D011795:Surveys and Questionnaires; D014481:United States; D055815:Young Adult