Schizotypal Personality Questionnaire: New sources of validity evidence in college students

  1. Fonseca-Pedrero, E. 12
  2. Fumero, A. 3
  3. Paino, M. 14
  4. de Miguel, A. 3
  5. Ortuño-Sierra, J. 2
  6. Lemos-Giráldez, S. 14
  7. Muñiz, J. 14
  1. 1 Centro de Investigacion Biomedica en Red de Salud Mental
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    Centro de Investigacion Biomedica en Red de Salud Mental

    Madrid, España

    ROR https://ror.org/009byq155

    Geographic location of the organization Centro de Investigacion Biomedica en Red de Salud Mental
  2. 2 Universidad de La Rioja
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    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

    Geographic location of the organization Universidad de La Rioja
  3. 3 Universidad de La Laguna
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    Universidad de La Laguna

    San Cristobal de La Laguna, España

    ROR https://ror.org/01r9z8p25

    Geographic location of the organization Universidad de La Laguna
  4. 4 Universidad de Oviedo
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    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

    Geographic location of the organization Universidad de Oviedo
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Journal:
Psychiatry Research

ISSN: 0165-1781

Year of publication: 2014

Volume: 219

Issue: 1

Pages: 214-220

Type: Article

DOI: 10.1016/J.PSYCHRES.2014.04.054 SCOPUS: 2-s2.0-84902549479 WoS: WOS:000339143700028 GOOGLE SCHOLAR

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Abstract

Schizotypal traits represent the behavioral expression of vulnerability to psychosis in general population. Among the most widely used measurement instruments, we could find the Schizotypal Personality Questionnaire (SPQ) (Raine, 1991). However, some aspects of its psychometric quality have yet to be analyzed. The main goal of the present study was to gather new sources of validity evidence of the SPQ scores in non-clinical young adults. The final sample was made up of 1123 college students (M=20.3 years; S.D.=2.6). The study of the internal structure using exploratory factor analysis revealed that SPQ items were grouped in a theoretical structure of seven second-order factors. Confirmatory factor analyses showed that the four-factor model (Paranoid) displayed better goodness-of-fit indices than the other hypothetical dimensional models tested. More complex measurement models, such as those tested using second-order confirmatory factor analyses and Exploratory Structural Equation Modeling, also showed adequate goodness-of-fit indices. The reliability of the SPQ scores ranged from 0.80 to 0.91. A total of 11 items showed differential functioning by gender. Advances in psychosis phenotype measurement open up new horizons to understand the structure and content of schizotypy. © 2014 Elsevier Ireland Ltd.