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Exploratory Graph Analysis of the Multidimensional Schizotypy Scale.

Alexander P Christensen1, Georgina M Gross2, Hudson F Golino3

  • 1Department of Psychology, University of North Carolina at Greensboro, Greensboro, NC 27402-6170, USA.

Schizophrenia Research
|December 22, 2018
PubMed
Summary

This study reveals that the Multidimensional Schizotypy Scale (MSS) and its brief version (MSS-B) have four underlying dimensions, offering a more detailed understanding of schizotypy. These findings refine schizotypy assessment and research applications.

Keywords:
Exploratory Graph AnalysisFactor analysisNetwork analysisSchizophrenia-spectrum disordersSchizotypy

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Area of Science:

  • Psychometrics
  • Clinical Psychology
  • Psychopathology

Background:

  • The Multidimensional Schizotypy Scale (MSS) and its brief version (MSS-B) are widely used to assess schizotypy.
  • Previous research has proposed theoretical dimensions for these scales, but their empirical structure requires further investigation.

Purpose of the Study:

  • To examine the dimensional structure of the Multidimensional Schizotypy Scale (MSS) and its brief version (MSS-B) using advanced analytical techniques.
  • To compare the empirical findings with the theoretically proposed dimensions and evaluate model fit.

Main Methods:

  • Exploratory Graph Analysis (EGA) was employed on two large, independent samples (N=6265 and N=1000) to identify the underlying dimensional structure.
  • Confirmatory Factor Analysis (CFA) was used to compare the fit of empirically derived dimensions against theoretically proposed models.

Main Results:

  • EGA identified four dimensions for the MSS: positive schizotypy, two negative schizotypy dimensions (affective and social anhedonia), and disorganized schizotypy.
  • For the MSS-B, EGA suggested three dimensions, aligning with positive, negative, and disorganized schizotypy.
  • Confirmatory factor analysis supported a four-factor model for both scales, indicating a more nuanced structure than previously theorized, particularly for negative schizotypy.
  • Exploratory Graph Analysis suggested that disorganized schizotypy may mediate positive and negative schizotypy dimensions.

Conclusions:

  • The findings support a four-dimensional structure for the MSS and MSS-B, providing a more nuanced interpretation of schizotypy, especially negative schizotypy.
  • These results have significant implications for future research utilizing the MSS and MSS-B, potentially leading to differential associations with other measures.