dr. Marjan Bakker

Bio

I’m Marjan Bakker and I’m an assistant professor at the Methods and Statistics department at Tilburg University. I want to improve science by investigating problems and possible solutions. I’m interested in reporting errors, the use of questionable research practices, statistical power, outliers in data, publication bias, and preregistration. Currently, I’m mainly working on some larger projects on preregistration and on a project to replicate Mahoney’s seminal study on publication bias (for which we got a NWO replication grant).

I also teach courses on regression analysis to psychology students (bachelor) and multilevel analysis to students from the research master and I like to work together with researchers from other departments.

Courses

• Correlational Research Methods
• Correlational Research Methods (Dutch P)
• Applied Methods and Statistics
• Applied Methods & Statistics (Dutch Pr.)
• RM: Multiv.Analys., incl. Multil. Models

Recent publications

1. Efficacy of a digitally supported regional systems intervention for s…

   Feltz-Cornelis, C. M. V. D., Hofstra, E., Elfeddali, I., Bakker, M., Metz, M., de Jong, J. J., & van Nieuwenhuizen, C. (2023). Efficacy of a digitally supported regional systems intervention for suicide prevention (SUPREMOCOL) in Noord-Brabant, the Netherlands. General Hospital Psychiatry: Psychiatry, Medicine and Primary Care, 84, 73 - 81.

2. Meta-analyzing the multiverse - A peek under the hood of selective re…

   Olsson-Collentine, A., van Aert, R. C. M., Bakker, M., & Wicherts, J. (Accepted/In press). Meta-analyzing the multiverse: A peek under the hood of selective reporting. Psychological Methods.

3. The Meta-Plot - A graphical tool for interpreting the results of a me…

   Van Assen, M. A. L. M., Van Den Akker, O. R., Augusteijn, H. E. M., Bakker, M., Nuijten, M. B., Olsson-Collentine, A., Stoevenbelt, A. H., Wicherts, J. M., & Van Aert, R. C. M. (2023). The Meta-Plot: A graphical tool for interpreting the results of a meta-analysis. Zeitschrift fur Psychologie / Journal of Psychology, 231(1), 65-78.

4. Dutch workers' attitudes towards having a coworker with mental health…

   van Beukering, I. E., Sampogna, G., Bakker, M., Joosen, M., Dewa, C. S., van Weeghel, J., & Henderson, C. (2023). Dutch workers' attitudes towards having a coworker with mental health issues or illness: A latent class analysis. Frontiers in Psychiatry, 14, Article 1212568.

5. How do psychology researchers interpret the results of multiple repli…

   van den Akker, O. R., Wicherts, J. M., Alvarez, L. D., Bakker, M., & van Assen, M. A. L. M. (2023). How do psychology researchers interpret the results of multiple replication studies? Psychonomic Bulletin and Review, 30(4), 1609-1620.