I'm an associate professor and teach at the Psychological and Mathematical Institutes of Leiden University. My research is about statistics, machine learning and psychological assessment.
I work on decision-tree methods, because they are relatively easy to understand by non-statisticians.
I develop open-source software packages for the programming environment R (links on left or GitHub).
My work has been published in journals like Psychological Methods, the Journal of Statistical Software, Information Fusion and World Psychiatry (see links on left or Google Scholar).
My work is featured in popular media (see links on left).
As Mary-Jo and the Support Vector Machines, I make music videos about statistical methods (see links on left or YouTube).