World's Best Scientists 2026 revealed!

D-Index & Metrics

Psychology

D-Index
58
Citations
15312
World Ranking
3839
National Ranking
49

Overview

Olivier Klein is affiliated with the Université Libre de Bruxelles in Belgium. Their research spans social sciences and psychology, with a particular focus on sociology and political science, clinical psychology, social psychology, cognitive neuroscience, and gender studies.

The scientist's work addresses several major topics, including misinformation and its impacts, psychology of moral and emotional judgment, social and intergroup psychology, COVID-19 and mental health, vaccine coverage and hesitancy, social media and politics, and behavioral health and interventions.

Klein has published extensively in various academic venues. Frequent publication outlets include the European Journal of Social Psychology, Zenodo (CERN European Organization for Nuclear Research), Psychologica Belgica, Journal of Social and Political Psychology, and Clinical Nutrition.

Collaborators frequently working with Klein consist of Olivier Luminet, Vincent Yzerbyt, Pascaline Van Oost, Maarten Vansteenkiste, and Sofie Morbée.

Some of the recent papers they have contributed to are:

  • Conspiracy mentality and political orientation across 26 countries (2022), published in Nature Human Behaviour
  • Link between gut microbiota and health outcomes in inulin-treated obese patients: Lessons from the Food4Gut multicenter randomized placebo-controlled trial (2020), published in Clinical Nutrition
  • A power-challenging theory of society, or a conservative mindset? Upward and downward conspiracy theories as ideologically distinct beliefs (2021), published in European Journal of Social Psychology
  • Investigating the Links Between Cultural Values and Belief in Conspiracy Theories: The Key Roles of Collectivism and Masculinity (2020), published in Political Psychology
  • The relation between conspiracism, government trust, and COVID-19 vaccination intentions: The key role of motivation (2022), published in Social Science & Medicine

Best Publications

  • Detecting outliers: Do not use standard deviation around the mean, use absolute deviation around the median

    Christophe Leys;Christophe Ley;Olivier Klein;Philippe Bernard

  • Behavioral priming: it's all in the mind, but whose mind?

    Stéphane Doyen;Olivier Klein;Cora-Lise Pichon;Axel Cleeremans

  • Social Identity Performance: Extending the Strategic Side of SIDE

    Olivier Klein;Russell Spears;Stephen D. Reicher

  • Detecting multivariate outliers: Use a robust variant of the Mahalanobis distance

    Christophe Leys;Olivier Klein;Yves Dominicy;Christophe Ley

  • Registered Replication Report: Strack, Martin, & Stepper (1988)

    E. J. Wagenmakers;Titia Beek;Laura Dijkhoff;Quentin F. Gronau

  • Integrating Sexual Objectification With Object Versus Person Recognition The Sexualized-Body-Inversion Hypothesis

    Philippe Bernard;Sarah J. Gervais;Jill Allen;Sophie Campomizzi

  • Doctoral students’ experiences leading to completion or attrition: a matter of sense, progress and distress

    Christelle Devos;Gentiane Boudrenghien;Nicolas Van der Linden;Assaad Azzi

  • A practical guide for transparency in psychological science

    Olivier Klein;Tom E. Hardwicke;Frederik Aust;Johannes Breuer

  • The strategic confirmation of meta-stereotypes: how group members attempt to tailor an out-group's representation of themselves.

    Olivier Klein;Assaad Elia Azzi

  • When group representations serve social change: The speeches of Patrice Lumumba during the Congolese decolonization

    Olivier Klein;Laurent Licata

  • Low Hopes, High Expectations: Expectancy Effects and the Replicability of Behavioral Experiments

    Olivier Klein;Stéphane Doyen;Christophe Leys;Pedro A. Magalhães de Saldanha da Gama

  • “Our Country Needs a Strong Leader Right Now”: Economic Inequality Enhances the Wish for a Strong Leader:

    Stefanie Sprong;Jolanda Jetten;Zhechen Wang;Kim Peters

  • Does European citizenship breed xenophobia?: European identification as a predictor of intolerance towards immigrants

    Laurent Licata;Olivier Klein

  • Poverty, inequality, and increased consumption of high calorie food : experimental evidence for a causal link

    Boyka Antonova Bratanova;Boyka Antonova Bratanova;Steve Loughnan;Olivier Klein;Almudena Claassen

  • ON THE OTHER SIDE OF THE MIRROR: PRIMING IN COGNITIVE AND SOCIAL PSYCHOLOGY

    Stéphane Doyen;Olivier Klein;Daniel J. Simons;Axel Cleeremans

  • Substitute or stepping stone? Assessing the impact of low‐threshold online collective actions on offline participation

    Sandy Schumann;Sandy Schumann;Olivier Klein

  • Link between gut microbiota and health outcomes in inulin -treated obese patients: Lessons from the Food4Gut multicenter randomized placebo-controlled trial.

    Sophie Hiel;Marco A. Gianfrancesco;Julie Rodriguez;Daphnée Portheault

  • Stereotypes and Behavioral Confirmation: From Interpersonal to Intergroup Perspectives

    Olivier Klein;Mark Snyder

  • Revisiting the Measurement of Anomie

    Ali Teymoori;Jolanda Jetten;Brock Bastian;Amarina Ariyanto

  • Religious identification and politicization in the face of discrimination: support for political Islam and political action among the Turkish and Moroccan second generation in Europe.

    Fenella Fleischmann;Fenella Fleischmann;Karen Phalet;Olivier Klein

  • Grounding: Sharing Information in Social Interaction

    Yoshi Kashima;Olivier Klein;Anna E. Clark

Frequent Co-Authors

Axel Cleeremans
Axel Cleeremans Université Libre de Bruxelles
Olivier Luminet
Olivier Luminet Université Catholique de Louvain
Mark Snyder
Mark Snyder University of Minnesota
Michał Bilewicz
Michał Bilewicz University of Warsaw
Jolanda Jetten
Jolanda Jetten University of Queensland
Olivier Corneille
Olivier Corneille Université Catholique de Louvain
Lowell Gaertner
Lowell Gaertner University of Tennessee at Knoxville
Michael J. A. Wohl
Michael J. A. Wohl Carleton University
Ying-yi Hong
Ying-yi Hong Chinese University of Hong Kong
James H. Liu
James H. Liu Massey University

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