Dr. Simone Malejka

Office hours
by appointment
3.33, IBW building
+49 221 470 3543

Dr. Simone Malejka


2017 Doctorate in Psychology (equivalent to Ph.D., University of Mannheim)
2011 Diploma in Psychology (equivalent to M.Sc., University of Mannheim)

Academic positions

2020–present Postdoctoral research associate (University of Cologne)
2018–2020 Postdoctoral research associate (University College London)
2011–2018 Graduate research assistant (University of Mannheim)

Research interests

My research investigates how latent cognitive processes contribute to observable behaviors. Most of my research falls within the area of human learning, memory, and consciousness (e.g., implicit learning, testing effects, recognition and source memory). I approach these topics with a combination of behavioral experiments and mathematical models (e.g., signal-detection theory, multinomial processing-tree models, Bayesian hierarchical models, global memory models). A particular focus lies on controlling for measurement error.


Vadillo, M. A., Malejka, S., & Shanks, D. R. (2023). Mapping the reliability multiverse of contextual cuing. PsyArXiv. https://doi.org/10.31234/osf.io/eshbg

Malejka, S., Heck, D. W., & Erdfelder, E. (2022). Recognition-memory models and ranking tasks: The importance of auxiliary assumptions for tests of the two-high-threshold model. Journal of Memory & Language, 127, 104356. https://doi.org/10.1016/j.jml.2022.104356

Vadillo, M. A., Malejka, S., Yu, D. Y. H., Dienes, Z., & Shanks, D. R. (2022). Raising awareness about measurement error in research on unconscious mental processes. Psychonomic Bulletin & Review, 29, 21-43. https://doi.org/10.3758/s13423-021-01923-y

Malejka, S., Vadillo, M. A., Dienes, Z., & Shanks, D. R. (2021). Correlation analysis to investigate unconscious mental processes: A critical appraisal and mini-tutorial. Cognition, 212, 104667. https://doi.org/10.1016/j.cognition.2021.104667

Shanks, D. R., Malejka, S., & Vadillo, M. A. (2021). The challenge of inferring unconscious mental processes. Experimental Psychology, 68(3), 113-129. https://doi.org/10.1027/1618-3169/a000517

Malejka, S., & Bröder, A. (2019). Exploring the shape of signal-detection distributions in individual recognition ROC data. Journal of Memory and Language, 104, 83-107. https://doi.org/10.1016/j.jml.2018.09.001

Starns, J. J., Cataldo, A. M., Rotello, C. M., …, Malejka, S., …, Wilson, J. (2019). Assessing theoretical conclusions with blinded inference to investigate a potential inference crisis. Advances in Methods and Practices in Psychological Science, 2(4), 335-349. https://doi.org/10.1177/2515245919869583

Bröder, A., & Malejka, S. (2017). On a problematic procedure to manipulate response biases in recognition experiments: The case of “implied” base rates. Memory, 25(6), 736-743. https://doi.org/10.1080/09658211.2016.1214735

Malejka, S., & Bröder, A. (2016). No source memory for unrecognized items when implicit feedback is avoided. Memory & Cognition, 44(1), 63-72. https://doi.org/10.3758/s13421-015-0549-8

Conference proceedings

Malejka, S., Barth, M., Haider, H., & Stahl, C. (2022). Abstracts of the 64th Conference of Experimental Psychologists (TeaP). Pabst Science Publishers.


2023 Teaching Award of the psychology student association at the University of Cologne
2022 Teaching Award of the psychology student association at the University of Cologne
2019 Best Ph.D. Thesis Award of the Cognitive Section of the German Society for Psychology


Research methods and psychological evaluation (meta-analysis), Statistics 1 & 2 (including R tutorial), Introduction to Bayesian statistics using JASP, Data analysis using SPSS, Milestones of memory psychology, Advanced cognitive psychology (memory models), Empirical research skills (source memory, testing effect), Diagnostic assessment and psychological testing

Student supervision

Supervision of B.Sc. and M.Sc. theses on human learning, memory psychology, consciousness, and statistical modeling of cognitive processes