Social power, moral psychology, sexism and gender and political psychology

Joris Lammers is a Professor at the Social Cognition Center (Faculty of Human Sciences) at the University of Cologne. He received an MA in Political Science and an MA in Psychology from Leiden University (2003), and a PhD in Social Psychology from Groningen University (2008). After working at Tilburg University and the University of Cologne as Assistant Professor, Joris was Full Professor at Bremen University before joining ECONtribute at Cologne. He is an Associate Editor at the Journal of Experimental Social Psychology and member of the European Association of Social Psychology.

Published papers

• Maintaining Cooperation through Vertical Communication of Trust when Removing Sanctions

  Posten, A. C., Uğurlar, P., Kube, S., & Lammers, J. (2025). Maintaining cooperation through vertical communication of trust when removing sanctions. Proceedings of the National Academy of Sciences, 122(12), e2415010122.

• Does Framing Climate Change Policies to Fit with Epistemic Needs for Predictability Reduce Conservatives’ Opposition?

  Lammers, J., Schulte, A., & Baldwin, M. (2023). Does Framing Climate Change Policies to Fit with Epistemic Needs for Predictability Reduce Conservatives’ Opposition? Analyses of Social Issues and Public Policy.

• Collective Nostalgia and Political Ideology

  Lammers, J. (2023). Collective Nostalgia and Political Ideology. Current Opinion in Psychology.

• Political-Ideological Differences in Cultural Pessimism and Nostalgia Reflect People’s Evaluation of Their Nation’s Historical Developments

  Lammers, J., & Uğurlar, P. (2023). Political-Ideological Differences in Cultural Pessimism and Nostalgia Reflect People’s Evaluation of Their Nation’s Historical Developments. Social Psychological and Personality Science.

• Disentangling the Factors behind Shifting Voting Intentions: The Bandwagon Effect Reflects Heuristic Processing, while the Underdog Effect Reflects Fairness Concerns.

  Lammers, J., Bukowski, M., Potoczek, A., Fleischmann, A., & Hofmann, W. (2022). Disentangling the Factors behind Shifting Voting Intentions: The Bandwagon Effect Reflects Heuristic Processing, while the Underdog Effect Reflects Fairness Concerns. Journal of Social and Political Psychology.

• How Vertical Elevation Affects Self-Other Integration as Measured by the Joint Simon Effect

  Van der Weiden, A., Pril, D., Dittrich, K., Richter, J., & Lammers, J. (2021) How Vertical Elevation Affects Self-Other Integration as Measured by the Joint Simon Effect. Acta Psychologica.

• A Chronic Lack of Perceived Personal Control Increases Women and Men’s Self-Reported Preference for High-Status Characteristics When Selecting Romantic Partners in Simulated Dating Situations

  Lammers, J., & Imhoff, R. (2021). A Chronic Lack of Perceived Low Personal Control Increases Women and Men’s Self-Reported Preference for High-Status Characteristics When Selecting Romantic Partners in Simulated Dating Situations. Social Psychological and Personality Science, 19485506211016309.

• Why People Hate Congress but Love Their Own Congressperson: An Information Processing Explanation

  Lammers, J., Pauels, E., Fleischmann, A., & Galinsky, A. D. (2021). Why People Hate Congress but Love Their Own Congressperson: An Information Processing Explanation. Personality and Social Psychology Bulletin, 01461672211002336.

• Two Sides of the Same Coin: A New Look at Differences and Similarities across Political Ideology

  Lammers, J., & Baldwin, M. (2022) Two Sides of the Same Coin: A New Look at Differences and Similarities across Political Ideology. Cambridge handbook of political psychology, Cambridge University Press.

• Power and Moral Thinking

  Fleischmann, A., & Lammers, J. (2020). Power and moral thinking. Current opinion in psychology, 33, 23-27.

• Make America Gracious Again: Collective Nostalgia can Increase and Decrease Support for Right-Wing Populist Rhetoric

  Lammers, J., & Baldwin, M. (2020). Make America gracious again: Collective nostalgia can increase and decrease support for right‐wing populist rhetoric. European Journal of Social Psychology.

• Correcting Misperceptions of Exponential Coronavirus Growth Increases Support for Social Distancing

  Lammers, J., Crusius, J., & Gast, A. (2020). Correcting misperceptions of exponential coronavirus growth increases support for social distancing. Proceedings of the National Academy of Sciences, 117(28), 16264-16266.

Discussion papers

• Maintaining Cooperation through Vertical Communication of Trust when Removing Sanctions