I am an Assistant Professor in Clinical Psychology at Leiden University, after working at / visiting the University of Amsterdam, University of Leuven, the University of Michigan, Arizona State University, Virginia Commonwealth University, and Free University of Berlin. I work in the fields of clinical psychology, psychiatry, epidemiology, and methodology, and occasionally dabble in philosophy of science. I run Eiko-Fried.com and Psych-Networks.com, and here is my CV.

My main interest lies in studying individual symptoms of mental disorders and their causal relations, a framework we have termed Symptomics. More generally, I am interested in four aspects of psychopathology research: measurement (how to best assess whether someone is ill), modeling (what statistical models are most appropriate to model psychopathology), ontology (what are mental disorders) and nosology (how do we best classify them). Apart from that, I am interested in improving cumulative psychological science through open science practices.

For an introduction of what I am up to, and why I think it matters, I recommend the short interview I gave after winning the Janet Taylor Spence award for transformative early career contributions in 2021. Another good overview is provided in the incredibly kind profile that Lancet Psychiatry published about me in 2019.

When I am not working, I enjoy taking and post-processing photographs, traveling, singing, cooking, reading, and boardgames / computer games / roleplaying games.