Publications

  • Wicherts, J. M., Veldkamp, C. L. S., Augusteijn, H. E. M., Bakker, M., van Aert, R. C. M., & van Assen, M. A. L. M. (submitted). Degrees of freedom in planning, running, analyzing, and reporting psychological studies. A checklist to avoid p-hacking.
  • Coomans, F., van Rijn, P., Bakker, M., van der Maas, H. L. J., & Maris, G. (under review). What's the score? A psychometric evaluation of item-level scoring rules for educational tests.
  • Bakker, M., Hartgerink, C. H. J., Wicherts, J. M., & Van der Maas, H. L. J. (2016). Researcher’s Intuitions about Power in Psychological Research. Psychological Science, 27, 1069-1077. doi: 10.1177/0956797616647519. Paper; Supplementary Materials; Data and materials.
  • Brinkhuis, M., Bakker, M., & Maris, G. (2015). Filtering data for detecting differential development. Journal of Educational Measurement, 52, 319-338. doi: 10.1111/jedm.12078.
  • Bakker, M. (2015). Power problems: n > 138. Cortex, 73, 1069-1077. doi: 10.1177/0956797616647519.
  • Bakker, M. (2014). Good Science, Bad Science: Questioning Research Practices in Psychological Research (dissertation).
  • Wagenmakers, E. J., Verhagen, J., Ly, A., Bakker, M., Lee, M. D., Matzke, D., Rouder, J. N., & Morey, R. D. (2014). A power fallacy. Behavior Research Methods, 47, 913-917. doi: 10.3758/s13428-014-0517-4.
  • Bakker, M. & Wicherts, J. M. (2014). Outlier removal and the relation with reporting errors and quality of psychological research. PLoS ONE, 9, e103360. doi: 10.1371/journal.pone.0103360. Project page (including registration, data, and code).
  • Bakker, M. & Wicherts, J. M. (2014). Outlier removal, sum scores, and the inflation of the Type I error rate in independent sample t tests. The power of alternatives and recommendations. Psychological Methods, 19, 409-427. doi: 10.1037/met0000014. Supplementary Materials; Project Page.
  • De Groot, A. D. (1956/2014). The meaning of “significance” for different types of research. Translated and annotated by Eric-Jan Wagenmakers, Denny Borsboom, Josine Verhagen, Rogier Kievit, Marjan Bakker, Angelique Cramer, Dora Matzke, Don Mellenbergh, and Han L. J. van der Maas. Acta Psychologica, 148, 188-194. doi: 10.1016/j.actpsy.2014.02.001. link; pdf.
  • Wicherts, J. M. & Bakker, M. (2013). Broken windows, mediocre methods, and substandard statistics. Group Processes & Intergroup Relations, published online 12 December 2013. doi: 10.1177/1368430213502557. link; Project page.
  • Bakker, M., Wagenmakers, E. J., Borsboom, D., Wicherts, J. M., van der Maas, H. L. J. (2013). Spelregels in de psychologie: over eerlijk en goed onderzoek. De Psycholoog, 48, 68-76.
  • Bakker, M., Cramer, A. O. J., Matzke, D., Kievit, R. A., Van der Maas, H. L. J., Wagenmakers, E. J., & Borsboom, D. (2013). Dwelling on the past. The European Journal of Personality, 27, 120-121. doi: 10.1002/per.1920. link. This is a commentary on the paper 'Recommendations for increasing replicability in psychology' by Asendorpf et al.
  • Bakker, M., Van Dijk, A. & Wicherts, J. M. (2012). The rules of the game called psychological science. Perspectives on Psychological Science, 7, 543-554. doi: 10.1177/1745691612459060. link; pdf; appendix; data; Project page.
  • Wicherts, J.M. & Bakker, M. (2012). Publish (your data) or (let the data) perish! Why not publish your data too? Intelligence, 40, 73-76. doi:10.1016/j.intell.2012.01.004. pdf metaData data
  • Wicherts, J. M., Kievit, R. A., Bakker, M., & Borsboom, D. (2012). Letting the daylight in: Reviewing the reviewers and other ways to maximize transparency in science. Frontiers in Computational Neuroscience, 6, 1-9. doi:10.3389/fncom.2012.00020. pdf
  • Wicherts, J. M., Bakker, M., & Molenaar, D. (2011). Willingness to share research data is related to the strength of the evidence and the quality of reporting of statistical results. PloS ONE, 6, e26828. doi:10.1371/journal.pone.0026828. pdf
  • Bakker, M., & Wicherts, J. (2011). The (mis)reporting of statistical results in psychology journals. Behavior Research Methods, 43, 666-678. doi:10.3758/s13428-011-0089-5. pdf; Project page.
  • De Boeck, P., Bakker, M., Zwitser, R., Nivard, M., Hofman, A., Tuerlinckx, F., et al. (2011). The Estimation of Item Response Models with the lmer Function from the lme4 Package in R. Journal of Statistical Software, 39, 1-28. pdf
  • Wicherts, J., & Bakker, M. (2009). Sharing: guidelines go one step forwards, two steps back. Nature, 461, 1053-1053. doi:10.1038/4611053c