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A 27-country test of communicating the scientific consensus on climate change

B. Većkalov, SJ. Geiger, F. Bartoš, MP. White, BT. Rutjens, F. van Harreveld, F. Stablum, B. Akın, A. Aldoh, J. Bai, F. Berglund, A. Bratina Zimic, M. Broyles, A. Catania, A. Chen, M. Chorzępa, E. Farahat, J. Götz, B. Hoter-Ishay, G. Jordan, S....

. 2024 ; 8 (10) : 1892-1905. [pub] 20240826

Language English Country England, Great Britain

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc25004026

Grant support
#2218595 National Science Foundation (NSF)

Communicating the scientific consensus that human-caused climate change is real increases climate change beliefs, worry and support for public action in the United States. In this preregistered experiment, we tested two scientific consensus messages, a classic message on the reality of human-caused climate change and an updated message additionally emphasizing scientific agreement that climate change is a crisis. Across online convenience samples from 27 countries (n = 10,527), the classic message substantially reduces misperceptions (d = 0.47, 95% CI (0.41, 0.52)) and slightly increases climate change beliefs (from d = 0.06, 95% CI (0.01, 0.11) to d = 0.10, 95% CI (0.04, 0.15)) and worry (d = 0.05, 95% CI (-0.01, 0.10)) but not support for public action directly. The updated message is equally effective but provides no added value. Both messages are more effective for audiences with lower message familiarity and higher misperceptions, including those with lower trust in climate scientists and right-leaning ideologies. Overall, scientific consensus messaging is an effective, non-polarizing tool for changing misperceptions, beliefs and worry across different audiences.

Barnard College Columbia University New York NY USA

Child and Adolescent Mental Health Center Copenhagen University Hospital Mental Health Services CPH Copenhagen Denmark

Cognitive Science Hub University of Vienna Vienna Austria

Columbia College Columbia University New York NY USA

Department of Behavioural and Cognitive Sciences University of Luxembourg Esch sur Alzette Luxembourg

Department of Cognitive Science Barnard College Columbia University New York NY USA

Department of Cognitive Science Columbia University New York NY USA

Department of Ecology Evolution and Environmental Biology Columbia University New York NY USA

Department of Health Policy and Management Mailman School of Public Health Columbia University New York NY USA

Department of Industrial Engineering and Operations Research Fu Foundation School of Engineering and Applied Science Columbia University New York NY USA

Department of Medicine and Psychology Sapienza University of Rome Rome Italy

Department of Psychology Behavioural and Economic Science University of Warwick Coventry UK

Department of Psychology Columbia University New York NY USA

Department of Psychology Faculty of Behavioural and Movement Sciences Vrije Universiteit Amsterdam Amsterdam the Netherlands

Department of Psychology Faculty of Education Kristianstad University Kristianstad Sweden

Department of Psychology Faculty of Psychology and Education Sciences University of Porto Porto Portugal

Department of Psychology Faculty of Social and Behavioural Sciences University of Amsterdam Amsterdam the Netherlands

Department of Psychology Faculty of Social Sciences Radboud University Nijmegen the Netherlands

Department of Psychology Heidelberg University Heidelberg Germany

Department of Psychology School of the Biological Sciences University of Cambridge Cambridge UK

Department of Psychology University of Ljubljana Ljubljana Slovenia

Department of Psychology University of Malta Msida Malta

Department of Psychology University of Maribor Maribor Slovenia

Department of Psychology Uppsala University Uppsala Sweden

Department of Women's and Children's Health Uppsala University Uppsala Sweden

Environmental Policy Group Wageningen University and Research Wageningen the Netherlands

Environmental Psychology Department of Cognition Emotion and Methods in Psychology Faculty of Psychology University of Vienna Vienna Austria

Faculty of Psychology Warsaw International Studies in Psychology University of Warsaw Warsaw Poland

Institute of Computer Science of the Czech Academy of Sciences Prague Czech Republic

Institute of Psychology Eötvös Loránd University Budapest Hungary

Institute of Psychology University of Innsbruck Innsbruck Austria

LAPCOS Université Côte d'Azur Nice France

Liberal Arts Program Faculty of Humanities Tel Aviv University Tel Aviv Israel

Motivation Psychology Department of Occupational Economic and Social Psychology Faculty of Psychology University of Vienna Vienna Austria

National Institute for Public Health and the Environment Bilthoven the Netherlands

Policy Research Group Centre for Business Research Judge Business School University of Cambridge Cambridge UK

Program in Cognitive Science Columbia University New York NY USA

School of General Studies Columbia University New York NY USA

Social Welfare Department and Center for CSR Social Entrepreneurship and Community Empowerment FISIP Universitas Padjadjaran Jatinangor Sumedang Indonesia

University of Mannheim Department of Psychology School of Social Sciences Mannheim Germany

University of Trento Department of Psychology and Cognitive Science Trento Italy

References provided by Crossref.org

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$a Communicating the scientific consensus that human-caused climate change is real increases climate change beliefs, worry and support for public action in the United States. In this preregistered experiment, we tested two scientific consensus messages, a classic message on the reality of human-caused climate change and an updated message additionally emphasizing scientific agreement that climate change is a crisis. Across online convenience samples from 27 countries (n = 10,527), the classic message substantially reduces misperceptions (d = 0.47, 95% CI (0.41, 0.52)) and slightly increases climate change beliefs (from d = 0.06, 95% CI (0.01, 0.11) to d = 0.10, 95% CI (0.04, 0.15)) and worry (d = 0.05, 95% CI (-0.01, 0.10)) but not support for public action directly. The updated message is equally effective but provides no added value. Both messages are more effective for audiences with lower message familiarity and higher misperceptions, including those with lower trust in climate scientists and right-leaning ideologies. Overall, scientific consensus messaging is an effective, non-polarizing tool for changing misperceptions, beliefs and worry across different audiences.
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