Reliability and validity of two Likert versions of the Schizotypal Personality Questionnaire (SPQ)

V Wuthrich, T C Bates

Research output: Contribution to journalArticlepeer-review


Two alternative formats of the Schizotypal Personality Questionnaire (SPQ: Raine, 1991) were compared to examine if a Likert format in which SPQ items could be interleaved with other personality measures would promote reporting of symptoms. The Likert versions correlated highly with the standard SPQ (0.88-0.94) and showed better internal reliability compared to the standard version in which three subscales had Cronbach alpha < 0.70. The Likert versions also identified additional high scorers missed by the standard version and so may be desirable when testing relatives of patients with schizophrenia. Norms for the new version administered to 834 subjects are provided. (c) 2004 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)1543-1548
Number of pages6
JournalPersonality and Individual Differences
Issue number7
Publication statusPublished - May 2005


  • SPQ
  • Schizotypy
  • Schizotypal Personality Disorder
  • validity
  • Schizotypal Personality Questionnaire

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