Category: Transdiagnostic

Symposium

Testing the Limits: A Network Analysis of 74 Schizotypal Items in 27,000 Participants

Sunday, November 19
10:15 AM - 11:45 AM
Location: Sapphire Ballroom M & N, Level 4, Sapphire Level

Keywords: Personality Disorders
Presentation Type: Symposium

Network analytic methods in psychopathology research were developed for—and have largely been applied to—comparably small datasets with several hundred participants. Recent work shows that not all of these studies lead to accurately estimated networks due to power issues. Here we present a network analysis of 74 schizotypal items from the Schizotypal Personality Questionnaire (SPQ), assessed in 27,000 participants from 12 countries and 21 sites. The mean age of participants was 22.1 years, 62.5% were women. Both sample size and item pool are very large compared to prior studies; sample size increases power, the number of items decreases power. We estimate a series of state-of-the-art regularized partial correlation networks: one for the full sample, and several to compare networks and centrality indices of subgroups, e.g. men vs. women. We investigate the stability and accuracy of all networks, and also estimate the novel metric node predictability: the variance of each node that is explained by all its neighbors. Analyses were carried out in R, and all syntax will be made available during the symposium, enabling other researchers to use it as a tutorial for conducting network analysis and network inference in their own cross-sectional data. 

Eiko I. Fried

Postdoctoral Fellow
University of Amsterdam

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