Bio

My academic education took place at the University of Amsterdam, where I obtained a Master degree in Behavioral Economics and Game Theory as well as a Research Master degree in Psychology. During my studies I realized that the social sciences are not functioning as well as they should and that there are issues at both the institutional level and at the level of individual researchers. In my PhD-project, I mainly focus on the latter by studying researchers' ideas about nonsignificant results, meta-analytic results, and the complexities of preregistration. Other research interests of mine include evolutionary psychology, human cooperation, and network analysis.

Teaching

In the academic year 2017/2018, I am responsible for the tutorials of the courses 'Techniques of Causal Analysis', and 'Construction and Analysis of Questionnaires'.

Recent publications

  1. Preregistration in psychology: Past, present, and prospects

    van den Akker, O. (2024). Preregistration in psychology: Past, present, and prospects.
  2. Comparing the prevalence of statistical reporting inconsistencies in …

    Van Aert, R. C. M., Nuijten, M. B., Olsson-Collentine, A., Stoevenbelt, A. H., Van Den Akker, O. R., Klein, R. A., & Wicherts, J. M. (2023). Comparing the prevalence of statistical reporting inconsistencies in COVID-19 preprints and matched controls: a registered report. Royal Society Open Science, 10(8), Article 202326.
  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. 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.
  5. Preregistration in practice - A comparison of preregistered and non-p…

    van den Akker, O. R., van Assen, M. A. L. M., Bakker, M., Elsherif, M., Wong, T. K., & Wicherts, J. M. (2023). Preregistration in practice: A comparison of preregistered and non-preregistered studies in psychology. Behavior Research Methods.

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