leidenpsychologyblog

Marc Molendijk is Associate Professor of Clinical Psychology at the Institute of Psychology, Leiden University.

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Just joking! …?! – Workplace bullying and mental health

Half a million people have suffered from bullying at work in the past year. And 80,000 of these people have been structurally humiliated, excluded, verbally abused, or threatened (TNO). What do we know about how workplace bullying affects our health?

Marc Molendijk and Bart Verkuil • September 28, 2015

Where on earth did the effect go?

One replication is worth at least a thousand t-tests, indeed, but several replications (let’s say about twenty) and well-powered studies are worth at least a million t-tests.

Marc Molendijk • March 19, 2013

Happiness and hormones: spring breaks, autumn falls

Our mood can be affected by the changing of the seasons. What do we understand about seasonal affective disorder (a.k.a. winter depression)?

Marc Molendijk • February 01, 2013

Leveling as a difference maker in clinical psychology

Income inequality has pernicious effects on well-being. Still, it does not seem to have had a tremendous backlash in the field of clinical psychology. Should it?

Marc Molendijk • January 31, 2013