On the Control of Psychological Networks

• Published in: Psychometrika Vol. 87; no. 1; pp. 188 - 213
• Main Authors: Henry, Teague R., Robinaugh, Donald J., Fried, Eiko I.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2022; Springer Nature B.V
• Subjects: Application Reviews and Case Studies; Assessment; Behavioral Science and Psychology; Control theory; Fundamental Concepts; Humanities; Humans; Intervention; Law; Mental Disorders; Network Psychometrics in Action - Applications and Case Studies; Networks; Psychology; Psychometrics; Quantitative psychology; Statistical Theory and Methods; Statistics for Social Sciences; Testing and Evaluation; complicated grief; intervention science; control theory; network psychometrics; psychopathology; personalized medicine
• ISSN: 0033-3123; 1860-0980; 1860-0980
• DOI: 10.1007/s11336-021-09796-9

The combination of network theory and network psychometric methods has opened up a variety of new ways to conceptualize and study psychological disorders. The idea of psychological disorders as dynamic systems has sparked interest in developing interventions based on results of network analytic tools. However, simply estimating a network model is not sufficient for determining which symptoms might be most effective to intervene upon, nor is it sufficient for determining the potential efficacy of any given intervention. In this paper, we attempt to remedy this gap by introducing fundamental concepts of control theory to both psychometricians and applied psychologists. We introduce two controllability statistics to the psychometric literature, average and modal controllability, to facilitate selecting the best set of intervention targets. Following this introduction, we show how intervention scientists can probe the effects of both theoretical and empirical interventions on networks derived from real data and demonstrate how simulations can account for intervention cost and the desire to reduce specific symptoms. Every step is based on rich clinical EMA data from a sample of subjects undergoing treatment for complicated grief, with a focus on the outcome suicidal ideation. All methods are implemented in an open-source R package netcontrol, and complete code for replicating the analyses in this manuscript are available online.