Taxonic structure of schizotypal personality disorder: A multiple-instrument, multi-sample study based on mixture models

Andrea Fossati, Alessandra Citterio, Federica Grazioli, Serena Borroni, Ilaria Carretta, Cesare Maffei, Marco Battaglia

Research output: Contribution to journalArticlepeer-review

Abstract

This study used a multi-sample, multiple-instrument strategy to evaluate the hypothesis that schizotypal personality disorder (SPD) is taxonic. In Study 1, 721 consecutively admitted inpatients and outpatients were evaluated with the Structured Clinical Interview for DSM-IV Axis II Personality Disorders (SCID-II) and the Personality Diagnostic Questionnaire-4+ (PDQ-4+). The data from both questionnaire types were submitted to multivariate normal mixture analysis, which was carried out on factor scores obtained from a three-factor model of SPD criteria; these results supported the hypothesis that SPD is taxonic. The same was true of Study 2, which administered the Semi-structured Interview for DSM-III-R Personality Disorders (SIDP-R) to an independent sample of 537 consecutively admitted outpatients. Similar findings were observed in Study 3, in which the SIDP-R was administered to 225 non-clinical subjects. The results show that the typology of DSM III-R and -IV SPD diagnosis is consistent with the latent structure of SPD features.

Original languageEnglish
Pages (from-to)71-85
Number of pages15
JournalPsychiatry Research
Volume137
Issue number1-2
DOIs
Publication statusPublished - Nov 15 2005

Keywords

  • Latent structure analysis
  • Mixture models
  • Schizotypal disorder
  • Structural equation modeling
  • Taxonomy

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry
  • Psychology(all)

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