Network replicability: a cross-cultural PTSD study across of clinical datasets

Let’s start with a teaser: This blog post is a summary of the first psychological network study ever looking at the replicability of network models in 4 datasets, with a total N of 2,782 (Preprint). The paper is fully reproducible, and includes the covariance matrices of the four datasets so …

Public time-series data of 40 outpatients (21 items, 130 measurements)

This guest post was written by Aaron Fisher (afisher@berkeley.edu) who is an Assistant Professor of Psychology and the Director of the Idiographic Dynamics Lab at the University of California, Berkeley. Aaron argues for a shift from nomothetic to idiographic research, and describes a new dataset he made publicly available for …

Public dataset with 1478 timepoints over 239 consecutive days

A new paper entitled “Data from ‘Critical Slowing Down as a Personalized Early Warning Signal for Depression’” was published by Jolanda Kossakowski and colleagues yesterday. The paper was published in the new Journal of Open Psychology Data that you may want to keep an eye on. They publish datasets, which …

Tutorial: how to review psychopathology network papers

The network literature on psychopathology is exploding, which means there are many reviews to be performed. I’m sure colleagues such as Denny Borsboom or Angélique Cramer have read and reviewed many more papers over the years than I did, but I did my share: 46 reviews since 2015. Many of …

The meaning of model equivalence: Network models, latent variables, and the theoretical space in between

This guest post was written by Denny Borsboom (dennyborsboom@gmail.com), University of Amsterdam, in response to a recent discussion on the equivalence of latent variable and network models. Recently, an important set of equivalent representations of the Ising model was published by Joost Kruis and Gunter Maris in Scientific Reports. The …

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 …