How theoretically distinct mechanisms can generate identical observations

This guest post was written by Joost Kruis (j.kruis@uva.nl) and summarizes the paper entitled “Three representations of the Ising model” published recently in Scientific Reports. Joost works in the Psychological Methods Department at the University of Amsterdam. The first sentence of the ‘About’ section on this website (and for that …

Mplus 8.0 with Dynamic Structural Equation Models

Most of you know Mplus, a statistical software that is considered by many to be state-of-the-art for Structural Equation Models (SEM). The network literature on psychopathology so far has been dominated by R, for instance when estimating cross-sectional network models via the packages qgraph, IsingFit, mgm, or bootnet, or time-series …

Six new network papers, including a review of the empirical literature

The last weeks have been pretty busy with teaching, traveling, and writing that I didn’t find the time I wanted to for blogging. To catch up, this blog post will feature several new network papers (in alphabetical order by first author). It is becoming increasingly hard to keep up with …

New paper: differential variability of variables drives network structure

In psychopathological networks, we often model ordinal items (problems or symptoms) that are not normally distributed, especially in general population samples. But if a variable shows a floor effect, meaning that the mean is close to 0, it often has a small variance, which in turn means that the variable …

R tutorial: power issues & robustness of network models

A new paper by Mohammad Afzali and colleagues was published a few days ago in the Journal of Affective Disorders, entitled “A Network Approach to the Comorbidity between Posttraumatic Stress Disorder and Major Depressive Disorder: the Role of Overlapping Symptoms”. The authors estimate the network structure of 36 symptoms in …

Collected presentations of ABCT 2016 network talks

The Association for Behavioral and Cognitive Therapies (ABCT) has traditionally been a conference of clinical research with a limited amount of methodological talks. This year, there were a number of symposia on network research, focusing on both idiographic and nomothetic aspects, although the majority of talks used regularized partial correlation …

Network talks at ABCT convention, October 27-30 New York

The Association for Behavioral and Cognitive Therapies (ABCT) hosts its 50-year anniversary conference in New York City in a few days. I browsed through the program and found 4 different symposia in which presenters will talk about empirical psychopathological network research, covering eating and weight disorders, OCD, anxiety disorders, and …

R tutorial: how to identify communities of items in networks

A problem we see in psychological network papers is that authors sometimes over-interpret the visualization of their data. This pertains especially to the layout and node placement of the graph, for instance: do nodes in the networks cluster in certain communities. Below I will discuss this problem in some detail, …

New “Psychological Dynamics” Facebook group

Sacha Epskamp had the great idea to create the public Facebook group Psychological Dynamics. The group serves as a central place to share and discuss news, blogs and publications related, but not limited to, psychological research on dynamical systems, complex systems, network models, time-series analysis, causal discovery and phase transitions. …

2 PhD positions on psychological network research (Groningen, NL)

There is a vacancy for a PhD position on critical transitions in psychopathology amongst adolescents at the University of Groningen (The Netherlands). The position is funded by a prestigious European Research Council (ERC) grant, and supervised (among others) by Hanneke Wigman, Marieke Wichers, and Catharina Hartman, who all have had …