Recent papers

    Further information

    Education

    10/2018Research Scientist, Psychological Assessment, University of Kassel
    09/2018Master in Psychology (M.Sc.), University of Kassel
    06/2016Bachelor in Psychology (B.Sc.), FernUniversität in Hagen
    10/2014Bachelor in Sociology (B.A.), Georg-August-University Göttingen

    Professional Experience

    11/2017-

    09/2018

    		Scientific Online Tutor for the bachelor thesis preparation course in Psychology, FernUniversität in Hagen

    10/2017-

    01/2018

    		Tutor for Psychological Assessment, University of Kassel

    11/2016-

    03/2018

    		Research Internship, Community Psychology, FernUniversität in Hagen

    01/2016-

    03/2016

    		Research Internship, Work and Organisational Psychology, FernUniversität in Hagen

    Awards and prizes

    09/2019Pearson Prize for an outstanding Master's thesis in the field of Psychological Assessment (awarded by the DPPD section of the DGPs)
    • Promise and pitfalls of machine learning algorithms in psychological research
    • Development of optimized short scales using metaheuristics
    • Personality assessment and development

    Preprints

    • Jankowsky, K., Belobrajdic, N., Węziak-Białowolska, D., Bialowolski, P., & McGrath, R. E. (2024, April 5). Character strengths as universal predictors of health? Using machine learning to examine the predictive validity of character strengths across cultures. doi.org/10.31234/osf.io/fzywe
    • Schroeders, U., Mariss, A., & Jankowsky, K. (in-principle acceptance). Predicting juvenile delinquency and criminal behavior in adulthood using machine learning. https://doi.org/10.31234/osf.io/ubs9e

    Peer-reviewed articles

    • Jankowsky, K., Zimmermann, J., Jaeger, U., Mestel, R., & Schroeders, U. (2024). First impressions count: Therapists’ impression on patients’ motivation and helping alliance predicts psychotherapy dropout. Psychotherapy Research. Advance online article. https://doi.org/10.1080/10503307.2024.2411985
    • Schroeders, U., Loos, A., Wiedemann, S., & Jankowsky, K. (in press). Is it just a game? Development and validation of a deductive version of mastermind as measure of reasoning ability. European Journal of Psychological Assessment. Advance online article. https://doi.org/10.1027/1015-5759/a000855
    • Schroeders, U., Morgenstern, M., Jankowsky, K., & Gnambs, T. (2024). Short-scale construction using meta-analytic Ant Colony Optimization: A demonstration with the Need for Cognition Scale. European Journal of Psychological Assessment. Advance online publication. https://doi.org/10.1027/1015-5759/a000818
    • Jankowsky, K., Krakau, L., Schroeders, U., Zwerenz, R., & Beutel, M. E. (2023). Predicting treatment response using Machine Learning: A registered report. British Journal of Clinical Psychology. Advance online publication. https://doi.org/10.1111/bjc.12452
    • Jankowsky, K., Steger, D., & Schroeders, U. (2024). Predicting lifetime suicide attempts in a community sample of adolescents using machine learning algorithms. Assessment, 31(3), 557–573. https://doi.org/10.1177/10731911231167490
    • Olaru, G., Jankowsky, K., & Allemand, M. (2023). Structural and inter-individual differentiation in personality across the adult lifespan. European Journal of Personality. https://doi.org/10.1177/08902070231171736
    • Terry, J., Ross, R. M., Nagy, T., Salgado, M., Garrido-Vásquez, P., Sarfo, J. O., … Field, A. P.. (2023). Data from an international multi-centre study of statistics and mathematics anxieties and related variables in university students (the SMARVUS dataset). Journal of Open Psychology Data. https://doi.org/10.5334/jopd.80
    • Wendt, L. P., Jankowsky, K., Zimmermann, J., Schroeders, U., Nolte, T., Fonagy, P., Montague, P. R., & Olaru, G. (2022). Mapping established psychopathology scales onto the Hierarchical Taxonomy of Psychopathology (HiTOP). Personality and Mental Health, 17(2), 117–134. https://doi.org/10.1002/pmh.1566
    • Steger, D., Jankowsky, K., Schroeders, U., & Wilhelm, O. (2022). The road to hell is paved with good intentions: How common practices in scale construction hurt validity. Assessment, 30(6), 1811–1824. https://doi.org/10.1177/10731911221124846
    • Jankowsky, K. & Schroeders, U. (2022). Validation and generalizability of machine learning prediction models on attrition in longitudinal studies. International Journal of Behavioral Development, 46(2), 169–176. https://doi.org/10.1177/01650254221075034
    • Olaru, G., & Jankowsky, K. (2021). The HEX-ACO-18: Developing an age-invariant HEXACO short scale using Ant Colony Optimization. Journal of Personality Assessment. https://doi.org/10.1080/00223891.2021.1934480
    • Tierney, W., Hardy, J. H., III., Ebersole, C., Viganola, D., Clemente, E., Gordon, M., Hoogeveen, S., Haaf, J., Dreber, A.A., Johannesson, M., Pfeiffer, T., Chapman, H., Gantman, A., Vanaman, M., DeMarree, K., Igou, E., Wylie, J., Storbeck J., Andreychik, M.R., McPhetres, J., Vaughn, L.A., Culture and Work Morality Forecasting Collaboration, & Uhlmann, E. L. (2021). A creative destruction approach to replication: Implicit work and sex morality across cultures. Journal of Experimental Social Psychology, 93, 104060. https://doi.org/10.1016/j.jesp.2020.104060 (Member of Forecasting Collaboration)
    • Tierney, W., Hardy, J. H., III., Ebersole, C., Leavitt, K., Viganola, D., Clemente, E., Gordon, M., Dreber, A.A., Johannesson, M., Pfeiffer, T., Hiring Decisions Forecasting Collaboration, & Uhlmann, E.L. (2020). Creative destruction in science. Organizational Behavior and Human Decision Processes, 161, 291-309. https://doi.org/10.1016/j.obhdp.2020.07.002 (Member of Forecasting Collaboration)
    • Jankowsky, K., Olaru, G., & Schroeders, U. (2020). Compiling measurement invariant short scales in cross-cultural personality assessment using Ant Colony Optimization. European Journal of Personality, 34, 470–485. https://doi.org/10.1002/per.2260