Persons

Joris Lammers

Publications (selection)

Fleischmann, A., Lammers, J., Stoker, J. I., & Garretsen, H. (2019).

"You Can Leave Your Glasses on: Glasses Can Increase Electoral Success." Social Psychology, 50(1), 38–52.
(2024)

García Ferrés, E. A., Van Berkel, L., Baldwin, M., & Lammers, J. (2024).

"Temporal Comparisons Shape System Justification Processes." Political Psychology, pops.13030. Advance online publication.

Liu, Z., Luan, M., Li, H., Stoker, J. I., & Lammers, J. (2024).

"Psychological Power Increases the Desire for Social Distance but Reduces the Sense of Social Distance." Journal of Experimental Social Psychology, 110, 104528. Advance online publication.

Schulte, A., Baldwin, M., & Lammers, J. (2024).

"Highlighting the Old in the “New Normal”: Appealing to Conservatives’ Focus on the Past Decreases Opposition to COVID-19 Measures." Social Psychology, 55(2), 88–100.

Schulte, A., & Lammers, J. (2024).

"The Cognitive-Motivational Roots of Conservatives’ Desire for the Past." Social Cognition, 42(3), 233–259.
(2023)

Feenstra, S., Stoker, J. I., Lammers, J., & Garretsen, H. (2023).

"Managerial Stereotypes Over Time: The Rise of Feminine Leadership." Gender in Management: An International Journal, 38(6), 770–783.

Lammers, J. (2023).

"Collective Nostalgia and Political Ideology." Current Opinion in Psychology, 52, 101607.

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, 194855062311737.

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. Advance online publication.

Lammers, J. (2023).

"Do Data Show That Textbooks in Psychology Treat Critique in an Ideological Manner?" Psychology Learning & Teaching, 22(3), 251–255.

Unkelbach, C., Alves, H., Baldwin, M., Crusius, J., Diel, K., Galinsky, A. D., Gast, A., Hofmann, W., Imhoff, R., Genschow, O., Lammers, J., Pauels, E., Schneider, I., Topolinski, S., Westfal, M., & Mussweiler, T. (2023).

"Relativity in Social Cognition: Basic Processes and Novel Applications of Social Comparisons." European Review of Social Psychology, 34(2), 387–440.
(2022)

Bago, B., Kovacs, M., Protzko, J., Nagy, T., Kekecs, Z., … Lammers, J., … Aczel, B. (2022).

"Situational Factors Shape Moral Judgements in the Trolley Dilemma in Eastern, Southern and Western Countries in a Culturally Diverse Sample." Nature Human Behaviour, 6(6), 880–895.

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, 10(2), 676–692.

Lammers, J., & Baldwin, M. (2022).

"Two Sides of the Same Coin: A New Look at Differences and Similarities Across Political Ideology." In C. G. Sibley & D. Osborne (Eds.), The Cambridge Handbook of Political Psychology (pp. 674–686). Cambridge University Press.

Lammers, J., Pauels, E., Fleischmann, A., & Galinsky, A. D. (2022).

"Why People Hate Congress but Love Their Own Congressperson: An Information Processing Explanation." Personality and Social Psychology Bulletin, 48(3), 412–425.

Mousavi, D., Schulte, A., & Lammers, J. (2022).

"Stressing the Advantages of Female Leadership Can Place Women at a Disadvantage: A Replication and Extension Of." Social Psychology, 53(4), 257–262.

Stoker, J. I., Garretsen, H., & Lammers, J. (2022).

"Leading and Working from Home in Times of COVID-19: On the Perceived Changes in Leadership Behaviors." Journal of Leadership & Organizational Studies, 29(2), 208–218.
(2021)

Ecker, Y., Imhoff, R., & Lammers, J. (2021).

"Self-Control Failure Increases a Strategic Preference for Submission as Means to Avoid Future Failure". Journal of Experimental Social Psychology, 95, 104155

Fleischmann, A., Lammers, J., Conway, P., & Galinsky, A.D. (2021).

"Kant be Compared: People High in Social Comparison Orientation Make Fewer—Not More—Deontological Decisions in Sacrificial Dilemmas" Social Psychological and Personality Science, 12(6), 984–995.

Fleischmann, A., Lammers, J., Diel, K., Hofmann, W., & Galinsky, A. D. (2021).

"More Threatening and More Diagnostic: How Moral Comparisons Differ from Social Comparisons." Journal of Personality and Social Psychology, 121(5), 1057–1078.

Lammers, J. & Imhoff, R. 2021.

"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." Social Psychological and Personality Science, 12(7), 1345–1357.

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, 220, 103404.
(2020)

Fleischmann, A., & Lammers, J. (2020).

"Power and Moral Thinking." Current Opinion in Psychology, 33, 23–27.

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.

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, 50(5), 943–954.
(2019)

Fleischmann, A., Lammers, J., Conway, P., & Galinsky, A. D. 2019.

"Paradoxical Effects of Power on Moral Thinking: Why Power Both Increases and Decreases Deontological and Utilitarian Moral Decisions." Social Psychological and Personality Science, 10, 110-120.

Fleischmann, A., Lammers, J., Conway, P., & Galinsky, A. D. (2019).

"Paradoxical Effects of Power on Moral Thinking: Why Power Both Increases and Decreases Deontological and Utilitarian Moral Decisions." Social Psychological and Personality Science, 10(1), 110–120.

Lammers, J., & Stoker, J. I. (2019).

"Power Affects Sexual Assertiveness and Sexual Esteem Equally in Women and Men." Archives of Sexual Behavior, 48(2), 645–652.

Lammers, J., & Burgmer, P. (2019).

"Power Increases the Self‐Serving Bias in the Attribution of Collective Successes and Failures." European Journal of Social Psychology, 49(5), 1087–1095.

Lammers, J., & Stoker, J. I. (2019).

"Social and Personal Power: A Closer Examination: An Invited Commentary to Mayiwar and Lai (2019)." Social Psychology, 50(4), 270–275.

Latu, I. M., Mast, M. S., Bombari, D., Lammers, J., & Hoyt, C. L. (2019).

"Empowering Mimicry: Female Leader Role Models Empower Women in Leadership Tasks Through Body Posture Mimicry." Sex Roles, 80(1–2), 11–24.

Meijs, M., Ratliff, K. A., & Lammers, J. (2019).

"Perceptions of Feminist Beliefs Influence Ratings of Warmth and Competence." Group Processes & Intergroup Relations, 22(2), 253–270.
(2018)

Lammers, J., Gast, A., Unkelbach, C., & Galinsky, A. D. (2018).

"Moral Character Impression Formation Depends on the Valence Homogeneity of the Context." Social Psychological and Personality Science, 9(5), 576–585.
(2017)

Guinote, A. & Lammers, J. 2017.

"Accentuation of Tending and Befriending Among the Powerless." In: Bukowski, M., Fritsche, I., Guinote, A. & Kofta, M. "Coping with Lack of Control in a Social World." New York, NY: Routledge, Taylor & Francis Group, 185-202.

Lammers, J. & Burgmer, P. 2017.

"Power Increases Anchoring Effects On Judgment." Social Cognition, 35(1).

Lammers, J., & Gast, A. (2017).

"Stressing the Advantages of Female Leadership Can Place Women at a Disadvantage." Social Psychology, 48(1), 28–39.

Lammers, J., Dubois, D., Rucker, D. D. & Galinsky, A. D. et al. 2017.

"Ease of Retrieval Moderates the Effects of Power: Implications for the Replicability of Power Recall Effects." Social Cognition, 35(1), 1-17.

Lammers, J., Koch, A., Conway, P., & Brandt, M. J. (2017).

"The Political Domain Appears Simpler to the Politically Extreme Than to Political Moderates." Social Psychological and Personality Science, 8(6), 612–622.

Leach, S., Weick, M., & Lammers, J. (2017).

"Does Influence Beget Autonomy? Clarifying the Relationship Between Social and Personal Power: Leach Et Al." Journal of Theoretical Social Psychology, 1(1), 5–14.

Meijs, M. H. J., Ratliff, K. A., & Lammers, J. 2017.

"The Discrepancy Between How Women See Themselves and Feminists Predicts Identification with Feminism." Sex Roles, 77(5-6), 293–308.
(2016)

Baldwin, M. & Lammers, J. 2016.

"Past-Focused Environmental Comparisons Promote Proenvironmental Outcomes for Conservatives." PNAS, 113(52), 14953-14957.

Lammers, J. & Maner, J. 2016.

"Power and Attraction to the Counternormative Aspects of Infidelity." Journal of Sex Research, 53(1), 54-63.

Lammers, J. & Imhoff, R. 2016.

"Power and Sadomasochism: Understanding the Antecedents of a Knotty Relationship.” Social Psychological and Personality Science, 1-7, 142-148.

Lammers, J., Stoker, J. I., Rink, F. & Galinsky, A. D. 2016.

"To Have Control Over or to Be Free From Others? The Desire for Power Reflects a Need for Autonomy." Personality and Social Psychology Bulletin, 42(4), 498-512.
(2015)

De Waal-Andrews, W., Gregg, A. P. & Lammers, J. 2015.

"When Status is Grabbed and when Status is Granted: Getting Ahead in Dominance and Prestige Hierarchies." British Journal of Social Psychology, 54(3), 445-464.

Galinsky, A., Lammers, J., Dubois, D. & Rucker, D.D. 2015.

"Power and Morality." Current Opinion in Psychology, 6, 15-19.

Inbar, Y. & Lammers, J. 2015.

"Increasing Ideological Tolerance in Social Psychology [Peer Commentary on “Political Diversity Will Improve Social Psychological Science” by J. L. Duarte et al.]." Behavioral and Brain Sciences, 38, 147-148.

Lammers, J., Galinsky, A. D., Dubois, D. & Rucker, D. D. 2015.

"Power and Morality." Current Opinion in Psychology, 6, 15-19.

Meijs, M., Lammers, J. & Ratliff, K. A. 2015.

"Gender Stereotype-Inconsistent Acts Are Seen as More Acceptable Than Stereotype-Consistent Acts, if They Are Clever." Social Psychology, 46, 291-305.

Mejis, M. H. J., Lammers, J. & Ratliff, K. A. 2015.

"Gender Stereotype-Inconsistent Acts Are Seen as More Acceptable Than Stereotype-Consistent Acts, If They Are Clever." Social Psychology, 46(5), 291-305.

Press releases

C-SEB has approved the following projects for funding in the 17th funding round: Junior Start-Up Grants Arno Apffelstaedt – “Signups” …

In the media

National Geographic, 26. Januar 2024 | Sarah Langer

“Klimawandel, politische Unruhen, Inflation, Krieg: Zahlreiche Krisen beunruhigen die Bevölkerung. Doch wieso reagieren einige mit Wut und Aggression darauf? […] Angst ist es, die schnell in Wut umschlagen kann. Das erklärt auch Dr. Joris Lammers, Professor für Politische Psychologie an der Uni Köln. “Unsicherheiten in der Gesellschaft lösen auch immer Unsicherheiten in jedem Einzelnen aus. Fragen wie “Was bedeutet das für mich persönlich?”, “Reicht das Geld?”, oder “Wie werde ich in Zukunft leben?” spielen eine große Rolle. Die Unsicherheit gilt als der größte Auslöser für Wut und Aggression bei uns Menschen.””

Link to article: https://www.nationalgeographic.de/geschichte-und-kultur/2024/01/hate-speech-darum-reagieren-menschen-in-krisensituationen-oft-aggressiv

Süddeutsche Zeitung, 13. März 2021 | Sebastian Herrmann

“Jeder möchte sich selbst gern als moralisch gut sehen. Doch warum vergleichen wir uns lieber mit fehlbareren Menschen – anstatt uns von Vorbildern inspirieren zu lassen?” (Media Coverage: Fleischmann et al. (2021): “More threatening and more diagnostic: How moral comparisons differ from social comparisons.”)

Link to article: https://www.sueddeutsche.de/wissen/psychologie-moral-1.5234018?reduced=true

Süddeutsche Zeitung, 6. November 2020 | Lara Thiede

“Der politische Psychologe Joris Lammers erklärt, warum der republikanische Präsident trotz vieler Lügen immer noch beliebt bei vielen US-Amerikaner*innen ist.”

Link to article: https://www.jetzt.de/politik/us-wahl-2020-warum-waehlen-viele-immer-noch-trump

BBC Future, 13.08.2020 | David Robson

“A simple mathematical mistake may explain why many people underestimate the dangers of coronavirus, shunning social distancing, masks and hand-washing. […] In March, Joris Lammers at the University of Bremen in Germany joined forces with Jan Crusius and Anne Gast at the University of Cologne to roll out online surveys questioning people about the potential spread of the disease. Their results showed that the exponential growth bias was prevalent in people’s understanding of the virus’s spread, with most people vastly underestimating the rate of increase.”

Link to article: https://www.bbc.com/future/article/20200812-exponential-growth-bias-the-numerical-error-behind-covid-19

Scientific American, 20.07.2020 | Lydia Denworth

“In responding to the pandemic, society may be hampered by cognitive and political beliefs that distort judgments and lead to irrational decisions […] Dutch political psychologist Joris Lammers of the University of Cologne in Germany had previously been studying responses to climate change, where he recognized people’s inability to grasp the exponential growth of carbon dioxide emissions. In June Lammers and his colleagues published a set of three studies in a paper in the Proceedings of the National Academy of Sciences USA that showed the same problem in the pandemic. […] Our cognitive and political biases intersect. “People are more susceptible to biases if they fit their own political narrative,” Lammers says.”

Link to article: https://www.scientificamerican.com/article/overcoming-psychological-biases-is-the-best-treatment-against-covid-19-yet/

Los Angeles Times, 12.12.2016 | Melissa Healy

“But to conservative ears, says a study published Monday in the journal PNAS, policy recommendations on the environment might sound more appealing if they’re aimed at restoring a known and beloved past than if they’re required to forestall disasters in an uncertain future.[…] Baldwin and Lammers write, the message of climate change has been framed in many ways — from fatalistic predictions about the future to calls for social progress[…].”

Link to article: http://www.latimes.com/science/sciencenow/la-sci-sn-environmental-messaging-conservative-20161212-story.html

Quirks & Quarks, 17.12.2016 | Bob McDonald

“Psychologist Dr. Matthew Baldwin and colleagues at the University of Cologne, in Germany, have considered how re-framing language around climate change increases its appeal for specific parts of the population. In a new study, Baldwin has found that Americans who are politically conservative and tend to be skeptical about climate change, are more likely to be persuaded by statements that connect climate change with a cherished, idyllic past. In contrast, liberals, or progressives, respond to both ‘past-focused’ messages and to appeals that talk about the future.”

Link to article: http://www.cbc.ca/radio/quirks/head-transplants-weed-research-flaws-fake-news-1.3897675/how-to-convince-a-conservative-climate-change-skeptic-1.3897742

New York Magazine, 31.03.2016 | Melissa Dahl

„You’ve been offered a promotion. […] There is, however, a teensy catch: Your new title doesn’t actually come with any more money than your current one. But think of the prestige — the power! So. Will you take it? No, you most likely would not [ …]. Across nine experiments, the researchers — from the University of Cologne, the University of Groningen, and Columbia University — consistently found that, although employees without a lot of power do indeed desire more of it, ultimately ‘gaining autonomy quenches the desire for power’. […] In one experiment, the researchers — led by Joris Lammers at the University of Cologne — guided people through the above thought experiment.”

Link to article: http://nymag.com/scienceofus/2016/03/all-anyone-really-wants-at-work-is-autonomy.html

The Guardian, 26.11.2014 | Emine Saner

„Research indicates that the mere suggestion someone has acquired new power makes them behave antisocially and eat more messily. […] A study by two researchers, Joris Lammers and Adam Galinsky, split 105 people into two groups and asked each to recall an instance in which they had power.”

Link to article: http://www.theguardian.com/commentisfree/2014/nov/26/high-pitched-voices-powers-research-antisocial

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