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Karen R. S. Hamann

@karenrshamann

Postdoc researcher at Leipzig University (social psychology), PhD at RPTU (environmental psychology)

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Latest posts by Karen R. S. Hamann @karenrshamann

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The Psychology of Collective Climate Action: Building Climate Courage How do we find the courage to act together against the climate crisis? This book weaves together real-life findings and examples from the socio-ecological movement with psychological research to show ...

A great resource for discussing the structural perspective on collective climate action! Feel free to also check out our open access book focusing on the psychological underpinnings of action :) www.routledge.com/The-Psycholo...

13.11.2025 08:31 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Thank you so much, Johanna! 😊 For everyone who is interested in our work on efficacy beliefs in the context of socio-ecological change, you can find the article here: journals.sagepub.com/doi/10.1177/...

18.09.2025 07:20 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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The Psychology of Collective Climate Action: Building Climate Courage How do we find the courage to act together against the climate crisis? This book weaves together real-life findings and examples from the socio-ecological movement with psychological research to show ...

... in more practical ideas on this, feel free to check out our Open Access book on collective climate action: www.routledge.com/The-Psycholo... Thanks again for asking!

09.09.2025 08:03 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

... of course would lead to less collective action. The bottom-line from a practical side is: In the environmental domain, collective efficacy is not enough. People need to be confident that they can contribute to a group. If you're interested ...

09.09.2025 08:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

... a negative predictor (so more collective efficacy = less collective action). My interpretation of this finding is that when including both, the meaning of collective efficacy changes into "We as Fridays for Future can mitigate climate change even if I don't contribute" - a belief that ...

09.09.2025 08:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

... (e.g., "I can make a significant contribution, so that we as Fridays for Future can mitigate climate change"). In many studies - also my own - when looking at both efficacy types simultaneously, participative efficacy is the more relevant one. And, often, collective efficacy turns into ...

09.09.2025 08:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Sure, that's my area of expertise :) collective efficacy is an individual's belief that their group can achieve their aims (e.g., "We as Fridays for Future can mitigate climate change"), while participative efficacy is and individual's belief in their own contribution to the group ...

09.09.2025 08:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Thanks, Alex! Directly saved and it's so true - to generate the answers we need to combat climate and environmental problems, we need (to fund) more research in social sciences.

09.09.2025 07:48 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

However, our article includes a brief original study in which we distinguished various types of activist behaviour (protester, change agent, educator, reformer) that may explain diverging findings in certain predictors. I'll send you a copy :)

09.09.2025 07:37 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Hey Cameron, as it is a descriptive and not a meta-analytical review, we did not assess the measurement quality of collective action - that would be an interesting research question for the future!

09.09.2025 07:37 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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The Social and Political Psychology of Protest Across and Within Cultures This topical book explores the phenomenon of when and why people protest. Based on social and political psychology, the book takes a comparative approach across and within cultures and examines how hu...

πŸ“š This chapter is part of the inspiring book The Social and Political Psychology of Protest Across and Within Cultures (ed by Martijn van Zomeren) that's currently only available as a print version.

If youβ€˜re interested in our chapter, feel free to contact me for a private copy of the manuscript πŸ–

08.09.2025 11:56 πŸ‘ 2 πŸ” 0 πŸ’¬ 3 πŸ“Œ 0

πŸ“£ Implications for the field:
β€’ SIMCA is a solid starting model for environmental/climate action but needs adapting and expanding
β€’ Rather than asking which are the most relevant predictors, we need to understand the contextual boundary conditions that determine when each predictors become relevant

08.09.2025 11:56 πŸ‘ 2 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

β€’ In less politicized contexts, environmental self-identity may replace social identification, and guilt may replace anger
β€’ Social norms need to be considered to fully comprehend environmental collective action

08.09.2025 11:56 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

β€’ Social identification with a politicized group/ movement was the most robust predictor of environmental collective action
β€’ Anger seems more relevant in (protest) contexts where injustice is focal
β€’ Participative efficacy (an individuals' efficacy as part of a group) outshone collective efficacy

08.09.2025 11:56 πŸ‘ 6 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
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Review alert 🚨 What motivates collective action for the environment? πŸ”ŽπŸŒ

We reviewed 27 publications to identify the proximal predictors of environmental collective action.

Here are our key findings:

08.09.2025 11:56 πŸ‘ 36 πŸ” 18 πŸ’¬ 2 πŸ“Œ 0
PressReader.com - Digital Newspaper & Magazine Subscriptions Digital newsstand featuring 7000+ of the world’s most popular newspapers & magazines. Enjoy unlimited reading on up to 5 devices with 7-day free trial.

Stephen Reicher's letter to the Chief Constable of Scotland, published in The Scotsman:
www.pressreader.com/uk/the-scots...

13.08.2025 09:19 πŸ‘ 40 πŸ” 23 πŸ’¬ 1 πŸ“Œ 2
The Psychology of Clean Energy: How YOU Can Make a Difference (w/ Dr. Karen Hamann)
The Psychology of Clean Energy: How YOU Can Make a Difference (w/ Dr. Karen Hamann) YouTube video by Clean Titans

I had an amazing time on the Clean Titans Podcast discussing how collective climate action and the energy transition start from the bottom up πŸ’‘πŸŒ± A big thanks to Syed Ali for the thoughtful and thought-provoking questions!
#EnergyTransition #ClimateAction #EnvironmentalPsychology

22.07.2025 09:26 πŸ‘ 5 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Thank you so much for appreciating and spreading our work, Kimberly!

26.06.2025 19:23 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

If you’re a scientist, you’ll get:
πŸ“š A clear, up-to-date overview of research in this area
✨ Inspiration for your next research project
🧠 Teaching-ready examples and exercises
🌍 A great resource to share with your practice collaborators, so they can understand your research better

26.05.2025 10:48 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

If you’re a practitioner, you’ll find:
🌿 Key drivers of collective climate action - and how to foster them
πŸͺ§ Real stories and examples from the climate movement
πŸͺž Reflective exercises to stay motivated and grounded
πŸ’ͺ A source of courage in the face of the climate crisis

26.05.2025 10:48 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

We dive deep into the psychology behind collective action - how people build a sense of identification with climate groups and come to believe that their collective efforts really can make a difference. It's about anger, activist burnout, protest perception and theories of socio-ecological change.

26.05.2025 10:47 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The book tackles two key questions: how can individuals be motivated to participate in collective climate action, and how can climate groups become resilient and effective?

26.05.2025 10:46 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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⚑Calling all environmental researchers and members of the climate movement - big news! ⚑

We’ve just released our new book, The Psychology of Collective Climate Action - and it’s Open Access!

You can download the book from Routledge or on our Wandelwerk page: www.wandel-werk.org/en/materialien

26.05.2025 10:46 πŸ‘ 35 πŸ” 15 πŸ’¬ 5 πŸ“Œ 2

Great collaboration with @epgroningen.bsky.social πŸ”₯

19.05.2025 08:19 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

πŸͺ΄ This paper underlines that we should not assume that people currently marginalized in our society are simply not motivated enough to protect the environment - rather they face real-world barriers that we need to address!

19.05.2025 08:16 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

πŸ‘¨β€πŸ¦°πŸ’° We consistently observed that men and people with a higher income are more aware of and willing to join a Community Energy Initiative.
πŸ’ͺπŸ‘₯ This can partly be explained by perceived efficacy to join and contact with already involved members, BUT NOT with pro-environmental motivation.

19.05.2025 08:16 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Inclusive community energy initiatives? Understanding involvement of different socio-demographic groups In order for community energy initiatives (CEIs) to grow and contribute to a just and sustainable energy transition, citizens from different socio-dem…

Paper alert! 🚨I'm so happy that his relevant paper is out there, ready for you to read it! Led by Fleur Goedkoop and co-authored by Lise Jans, Goda Perlaviciute and myself, we've investigated motivations around Community Energy Initiatives in members and non-members. What did we find?

19.05.2025 08:15 πŸ‘ 3 πŸ” 2 πŸ’¬ 3 πŸ“Œ 0
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Sage Journals: Discover world-class research Subscription and open access journals from Sage, the world's leading independent academic publisher.

And a link to our triple-A framework: journals.sagepub.com/doi/10.1177/...

01.05.2025 09:52 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

N = 3833, Germany, Turkey, UK, cross-sectional

01.05.2025 09:52 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

They challenge the nothing-to-lose hypothesis by demonstrating that confrontational actions are not driven by the low efficacy of non-confrontational strategies or low political trust, but rather by the legitimacy of protest violence and the efficacy of confrontational tactics.

01.05.2025 09:52 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0