Marjolein Fokkema is an assistant professor in statistical methods for psychology. She is an expert in machine learning as well as psychological assessment. She teaches at the Psychological and Mathematical institutes of Leiden University.

Her main research interest is in decision-tree methods: Statistical methods that provide results in the form of decision trees. An interview about this work recently featured on the university's website: English or Dutch.

Dr. Fokkema's research has been published in high-impact journals such as Psychological Methods, the Journal of Statistical Software and Information Fusion. For an overview, see links on the left or Google Scholar.

She implements her methods in open-source software packages for R, a statistical programming environment. For an overview, see links on the left or Github.