| Volume 8, Issue 3, 265, 2017 |
|Return to Issue List |
|Towards a schizotypy core: convergence and divergence of two empirically-derived self-report measures from a nonclinical sample|
| Alex Cohen - Louisiana State University|
| Eduardo Fonseca-Pedrero - Department of Educational Sciences, University of |
|Volume 8, Issue 3, 2017, Pages 265|
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|
Resolving the structure of schizotypy
Procedures and Measures
Mental Health Symptoms and History.
Factor Structure of the Schizotypy Scales.
Convergence of the SPQ-BR and WSS-SF.
|Dr. Alex Cohen |
|schizotypy; schizophrenia; liability; SPQ; WSS; |
|Received 30 Mar 2016; Revised 25 Jan 2017; Accepted 25 Jan 2017; In Press 19 Feb 2017 |