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

Recent publications

  1. The APOE ε4 allele in relation to pre- and postsurgical cognitive fun…

    Butterbrod, E., Sitskoorn, M., Bakker, M., Jakobs, B., Fleischeuer, R., Roijers, J., Rutten, G-J., & Gehring, K. (2021). The APOE ε4 allele in relation to pre- and postsurgical cognitive functioning of patients with primary brain tumors. European Journal of Neurology.
  2. The association between suicide-related media coverage and suicide - …

    Hofstra, E., Bakker, M., Diepstraten, C. A. M., van Nieuwenhuizen, C., & van der Feltz-Cornelis, C. M. (2021). The association between suicide-related media coverage and suicide: A cross-sectional observational study. Archives of Suicide Research.
  3. Group and individual change in cognitive functioning in patients with…

    Schimmel, W. C. M., Verhaak, E., Bakker, M., Hanssens, P. E. J., Sitskoorn, M. M., & Gehring, K. (2021). Group and individual change in cognitive functioning in patients with 1 to 10 brain metastases following Gamma Knife radiosurgery. Clinical Oncology, 33(5), 314-321.
  4. Group and individual change in cognitive functioning in patients with…

    Schimmel, W., Verhaak, E., Bakker, M., Hanssens, P. E. J., Sitskoorn, M., & Gehring, K. (Accepted/In press). Group and individual change in cognitive functioning in patients with 1-10 brain metastases following Gamma Knife radiosurgery. Clinical Oncology.
  5. Ensuring the quality and specificity of preregistrations

    Bakker, M., Veldkamp, C. L. S., Assen, M. A. L. M. V., Crompvoets, E. A. V., Ong, H. H., Nosek, B. A., Soderberg, C. K., Mellor, D., Wicherts, J. M., & Bero, L. (Ed.) (2020). Ensuring the quality and specificity of preregistrations. PLOS Biology, 18(12), [e3000937].

Find an expert or expertise