*bold names indicate lab members
Pre-Prints:
Protzko, J. (2026, March 24). But r Won’t Do That: The Limits of Standardized Covariance. https://doi.org/10.31234/osf.io/qt54d_v1
Protzko, J. (2026, March 18). How Long Do Participants Remember What They Said?. https://doi.org/10.31234/osf.io/3uz7d_v1
Alsalti, T., Freeman, Z., Hussey, I., Protzko, J., Lakens, D., Elson, M., & Arslan, R. C. (2026, March 18). From Ells to Metres: Population norms should supersede sample-local standardisation. https://doi.org/10.31234/osf.io/z34hg_v2
Protzko, J. (2026, March 12). Participants Do Not Read Consent Forms in Online Studies. https://doi.org/10.31234/osf.io/npa3b_v2
Protzko, J., & James-Brown, S. (2026, March 4). I Won’t Do What You Tell Me: Noncompliance, Encouragement, and Preserving Causality in Experiments. https://doi.org/10.31234/osf.io/xpjkh_v1
Protzko, J., Silan, M. A., & Grinschgl, S. (2026, January 18). How to Randomly Sample the Globe: A First Step. https://doi.org/10.31234/osf.io/chqvu_v1
Green, L., James-Brown, S., & Protzko, J. (2026, January 5). Manipulating Subjective Socioeconomic Status and its Downstream (non) Effects: Two Direct Replications with Extensions. https://doi.org/10.31234/osf.io/n86rt_v1
Protzko, J. (2025, October 8). Science Needs a Memorandum of Understanding. https://doi.org/10.31234/osf.io/m586h_v1
Protzko, J. (2025, September 8). Stop Thinking You Know How Things Have Changed…Go Measure it. https://doi.org/10.31234/osf.io/4v6mf_v1
Protzko, J. (2025, September 2). How to Succeed In Writing the Next Social/Techno Panic Article Without Really Trying. https://doi.org/10.31234/osf.io/cvnhu_v1
Bernier, H., & Protzko, J. (2025, July 16). The U-Curve of Happiness is not Consistent Across Measures. https://doi.org/10.31234/osf.io/7y3wf_v2
Protzko, J., James-Brown, S., Green, L., Cotto, N., & Marathe, S. (2025, July 21). An Experimental Test of What Socioeconomic Status is: It’s (almost) (mostly) all about the money. https://doi.org/10.31234/osf.io/76w9m_v1
Protzko, J. (2025, June 30). The Experimental Human Sciences has to Deal with Individual Differences: X-Phi as a Case Study. https://doi.org/10.31234/osf.io/pjcer_v1
Protzko, J., & Smith, K. A. (2025, April 24). The Myth of the Unmoving Past. https://doi.org/10.31234/osf.io/wa8tj_v1
Sullivan, E., & Protzko, J. (2024, December 10). On the Need to Accurately Track Disorder Rates: The Case of Anorexia Nervosa. https://doi.org/10.31234/osf.io/gjncz
Recent Projects Published:
Protzko, J. (Accepted). Where Can Big Team Science Go Next? Foundational Tests, Unique Populations, and Strict Theory Testing. Royal Society of Open Science, https://doi.org/10.31234/osf.io/xktp4_v2
Protzko, J. (Accepted). The Online Volunteer Subject. Meta-Psychology https://doi.org/10.31234/osf.io/gh2ck
Kaveladze, B., Voelkel, J. G., Stagnaro, M., Huang, M., Smock, A., Sullivan, E., …Protzko, J....Schleider, J. L. (2026). A Crowdsourced Megastudy of 12 Digital Single-Session Interventions for Depression in American Adults. Nature Human Behaviour. https://doi.org/10.1038/s41562-026-02415-6
Genschow, O., Protzko, J., & Braem, S. (2025) Context Limits the Lasting Impact of Reading Anti-Free Will Texts on Self-Reported Beliefs—A Registered Report. Journal of Experimental Social Psychology, https://osf.io/7ftsk_v1/download/
Buchanan, E. M., Cuccolo, K., Heyman, T., van Berkel, N., Coles, N. A., Iyer, A., ...Protzko, J., ...Villar, L. M.... & Ghasemi, H. (2025). Measuring the semantic priming effect across many languages. Nature Human Behaviour, 1-20. https://gala.gre.ac.uk/id/eprint/50644/1/50644%20EVANS_Measuring_The_Semantic_Priming_Effect_Across_Many_Languages_%28OA%20PREPRINT%29_2025.pdf
Protzko, J. (2025). Are we jingling modern hunter-gatherers and early Homo sapiens?. Behavioral and Brain Sciences, 48, e15.
Protzko, J. (2024). Invariance: What Does Measurement Invariance Allow Us to Claim? Educational and Psychological Measurement, 85(3), 458-482.
Topete, A., He, C., Protzko, J., Schooler, J., & Hegarty, M. (2024). How is GPS used? Understanding navigation system use and its relation to spatial ability. Cognitive research: principles and implications, 9(1), 16-32.
Szkody, E., Spence, A., Özdoğru, A., Tushir, B., Chang, F., AKKA, H.,...Chirsitiano, O., ...Protzko, J., .... Cascalheira, C. J. (2024). Social Support and Help-Seeking Worldwide. Current Psychology,
Vaidis, D. C., Sleegers, W. W., Van Leeuwen, F., DeMarree, K. G., Sætrevik, B., Ross, R. M., ...Protzko, J., ... Smith, K. A., ...& Priolo, D. (2024). A multilab replication of the induced-compliance paradigm of cognitive dissonance. Advances in Methods and Practices in Psychological Science, 7(1), 25152459231213375.
Oshiro, B., McAuliffe, W. H., Luong, R., Santos, A. C., Findor, A., Kuzminska, A. O., ...Protzko, J., ... & Flake, J. K. (2024). Structural Validity Evidence for the Oxford Utilitarianism Scale Across 15 Languages. Psychological Test Adaptation and Development.
Landry, A. P., Fincher, K., Barr, N., Brosowsky, N. P., Protzko, J., Ariely, D., & Seli, P. (2024). Harnessing dehumanization theory, modern media, and an intervention tournament to reduce support for retributive war crimes. Journal of Experimental Social Psychology, 111, 104567. https://doi.org/10.1016/j.jesp.2023.104567
Protzko, J., & Schooler, J. (2023). What I didn’t grow up with is dangerous: Personal experience with a new technology or societal change reduces the belief that it corrupts youth. Frontiers in Psychology, 14, 1017313.
Protzko, J., Tobia, K., Strohminger, N., & Schooler, J. W. (2023). Do Obligations Follow the Mind or Body?. Cognitive Science, 47(7), e13317.
Lundmark, S., Protzko, J., & Weissenbilder, M. (2023). The need for public opinion and survey methodology research to embrace preregistration and replication, exemplified by a team’s failure to replicate their own findings on visual cues in grid-type questions. International Journal of Public Opinion Research, 35(1), edac040.
Protzko, J., Lundmark, S., Walleczek, J., & Schooler, J. (2022). Nonlinear effect amplification: Differential susceptibility of Verbal Overshadowing as a function of time to interference. Journal of Applied Research in Memory and Cognition.
Protzko, J., & Schooler, J. (2022). Moral contamination: Perceptions of good (but not bad) deeds depend on the ethical history of the actor. Frontiers in Psychology, 13.
Landry, A. P., Ihm, E., Protzko, J., & Schooler, J. W. (2022). Essentially subhuman: Psychological essentialism facilitates dehumanization. Peace and Conflict: Journal of Peace Psychology, 28(2), 167.
Protzko, J., & Schooler, J. W. (2022). Who Denigrates Today’s Youth?: The Role of Age, Implicit Theories, and Sharing the Same Negative Trait. Frontiers in psychology, 13.
Edelsbrunner, P. A., Sebben, S., Frisch, L. K., Schüttengruber, V., Protzko, J., & Thurn, C. M. (2022). How to understand a research question—a challenging first step in setting up a statistical model. Religion, Brain & Behavior, 1-3.
Hoogeveen, S., Sarafoglou, A., Aczel, B., Aditya, Y., Alayan, A. J., Allen, P. J., ...Protzko, J. … & Nilsonne, G. (2022). A many-analysts approach to the relation between religiosity and well-being. Religion, Brain & Behavior, 1-47.
Pages, R., Protzko, J., & Bailey, D. H. (2022). The Breadth of Impacts from the Abecedarian Project Early Intervention on Cognitive Skills. Journal of Research on Educational Effectiveness.
Laukkonen, R., Kaveladze, B., Protzko, J., Tangen, J. M., von Hippel, B., & Schooler, J. (2022). The ring of truth: Irrelevant insights make worldviews seem true. Scientific Reports
Genschow, O., Cracco, E., Schneider, J., Protzko, J., Wisniewski, D., Brass, M., & Schooler, J. W. (2021). Manipulating belief in free will and its downstream consequences: A meta-analysis. Personality and Social Psychology Review, 10888683221087527.
Protzko, J. & Colom, R. (2021) Testing the structure of human intelligence using evidence obtained from the impact of brain lesions over cognitive abilities. Intelligence.