ISSN 2043-8087
Journal of Experimental Psychopathology
 Volume 8, Issue 3, 265, 2017
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Towards a schizotypy core: convergence and divergence of two empirically-derived self-report measures from a nonclinical sample

Authors
  Alex Cohen - Louisiana State University
  Eduardo Fonseca-Pedrero - Department of Educational Sciences, University of

Volume 8, Issue 3, 2017, Pages 265
DOI: http://dx.doi.org/10.5127/jep.057416

Abstract

Schizotypal personality traits are important for understanding the various manifestations of schizophrenia-spectrum liability. It is unclear whether these measures are redundant in the phenotypes they cover. Data from a recent study suggests that the Wisconsin Schizotypy Scales and the Schizotypal Personality Questionnaire converge into positive and negative syndromes. The present study extended these findings using item-level Exploratory Structural Equation Modeling (ESEM) of two empirically derived revisions of these scales, the WSS – Short Form (WSS-SF) and the SPQ – Brief Revised (SPQ-BR). ESEM analysis of the SPQ-BR revealed a seven-factor subordinate and three-factor superordinate solution, whereas the WSS-SF showed a three factor solution. Item-level ESEM of the SPQ-BR and WSS-SF revealed a four factor solution: positive, negative, disorganized and physical anhedonia. Nearly all of the factors revealed from these ESEMs explained unique variance in clinical symptoms, notably current psychosis. The negative factors were important for understanding treatment history. These data suggest that schizotypy is phenotypically heterogeneous with a similar structure as seen in schizophrenia and that individual measures are not redundant in their coverage of these traits. 


Table of Contents
Introduction
 Resolving the structure of schizotypy
Method
 Participants
 Procedures and Measures
  Schizotypal traits.
  Mental Health Symptoms and History.
 Data Analyses
Results
 Factor Structure of the Schizotypy Scales.
 Convergence of the SPQ-BR and WSS-SF.
 Clinical correlates.
Discussion
References

Correspondence to
Dr. Alex Cohen

Keywords
schizotypy; schizophrenia; liability; SPQ; WSS;

Dates
Received 30 Mar 2016; Revised 25 Jan 2017; Accepted 25 Jan 2017; In Press 19 Feb 2017









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