Karen Hamann

1.3k total citations · 2 hit papers
27 papers, 618 citations indexed

About

Karen Hamann is a scholar working on Management, Monitoring, Policy and Law, Sociology and Political Science and Applied Psychology. According to data from OpenAlex, Karen Hamann has authored 27 papers receiving a total of 618 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Management, Monitoring, Policy and Law, 12 papers in Sociology and Political Science and 5 papers in Applied Psychology. Recurrent topics in Karen Hamann's work include Environmental Education and Sustainability (14 papers), Behavioral Health and Interventions (5 papers) and Social Acceptance of Renewable Energy (4 papers). Karen Hamann is often cited by papers focused on Environmental Education and Sustainability (14 papers), Behavioral Health and Interventions (5 papers) and Social Acceptance of Renewable Energy (4 papers). Karen Hamann collaborates with scholars based in Germany, Netherlands and Sweden. Karen Hamann's co-authors include Gerhard Reese, Marlis Wullenkord, Laura S. Loy, Josephine Tröger, Martijn van Zomeren, Claudia Menzel, Lea Marie Heidbreder, Anna Baumann, Lise Jans and Goda Perlaviciute and has published in prestigious journals such as Energy Policy, Climatic Change and Frontiers in Psychology.

In The Last Decade

Karen Hamann

19 papers receiving 587 citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Anxiety and climate change: a validation of the Climate Anxiety Scale in a German-speaking quota sample and an investigation of psychological correlates

2021 157 citations Marlis Wullenkord, Josephine Tröger et al. Climatic Change profile →
Believing That We Can Change Our World for the Better: A Triple-A (Agent-Action-Aim) Framework of Self-Efficacy Beliefs in the Context of Collective Social and Ecological Aims

2023 62 citations Karen Hamann, Marlis Wullenkord et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Karen Hamann Germany	12	363	356	170	98	71	27	618
Alexander Maki United States	14	384 1.1×	508 1.4×	178 1.0×	251 2.6×	42 0.6×	22	927
Laura S. Loy Germany	13	492 1.4×	431 1.2×	212 1.2×	96 1.0×	97 1.4×	23	868
Viktoria Cologna Switzerland	15	429 1.2×	325 0.9×	100 0.6×	83 0.8×	43 0.6×	28	656
Marlis Wullenkord Germany	10	283 0.8×	226 0.6×	107 0.6×	36 0.4×	85 1.2×	15	442
Hoi‐Wing Chan Hong Kong	16	497 1.4×	546 1.5×	157 0.9×	274 2.8×	75 1.1×	34	1.0k
Štěpán Veselý Norway	11	227 0.6×	339 1.0×	121 0.7×	174 1.8×	42 0.6×	28	612
Gregg Sparkman United States	13	616 1.7×	637 1.8×	284 1.7×	188 1.9×	44 0.6×	26	1.2k
Susie Wang Netherlands	10	390 1.1×	262 0.7×	141 0.8×	42 0.4×	41 0.6×	12	546
John Paul Schott United States	7	359 1.0×	402 1.1×	159 0.9×	186 1.9×	50 0.7×	8	857
Kimin Eom Singapore	14	407 1.1×	317 0.9×	113 0.7×	121 1.2×	21 0.3×	27	710

Countries citing papers authored by Karen Hamann

Since Specialization

Citations

This map shows the geographic impact of Karen Hamann's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Karen Hamann with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Karen Hamann more than expected).

Fields of papers citing papers by Karen Hamann

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Karen Hamann. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Karen Hamann. The network helps show where Karen Hamann may publish in the future.

Co-authorship network of co-authors of Karen Hamann

This figure shows the co-authorship network connecting the top 25 collaborators of Karen Hamann. A scholar is included among the top collaborators of Karen Hamann based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Karen Hamann. Karen Hamann is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Blair, Lisa M., et al.. (2025). Cannabis use patterns, motivations, and reasons for abstinence in pregnancy. Frontiers in Psychiatry. 16. 1613324–1613324.

Hamann, Karen, et al.. (2025). The Psychology of Collective Climate Action.

Hamann, Karen, et al.. (2024). Klimabewegt, Die Psychologie von Klimaprotest und Engagement. oekom verlag eBooks.

Jans, Lise, et al.. (2024). How bottom-up and top-down governance of community energy initiatives affects citizens’ perceptions, acceptability, and willingness to join. Energy Policy. 195. 114389–114389. 3 indexed citations

Hamann, Karen, Lise Jans, Torsten Masson, et al.. (2024). Energy citizenship as people's perceived (collective) rights and responsibilities in a just and sustainable energy transition - scale development and validation. Journal of Environmental Psychology. 96. 102310–102310. 5 indexed citations

Hamann, Karen, Brigitta Lurger, Lise Jans, et al.. (2023). An interdisciplinary understanding of energy citizenship: Integrating psychological, legal, and economic perspectives on a citizen-centred sustainable energy transition. Energy Research & Social Science. 97. 102959–102959. 28 indexed citations

Dyjakon, Arkadiusz, et al.. (2021). How Clusters Create Shared Value in Rural Areas: An Examination of Six Case Studies. Sustainability. 13(8). 4578–4578. 11 indexed citations

Wullenkord, Marlis & Karen Hamann. (2021). We Need to Change: Integrating Psychological Perspectives Into the Multilevel Perspective on Socio-Ecological Transformations. Frontiers in Psychology. 12. 655352–655352. 19 indexed citations

Wullenkord, Marlis, Josephine Tröger, Karen Hamann, Laura S. Loy, & Gerhard Reese. (2021). Anxiety and climate change: a validation of the Climate Anxiety Scale in a German-speaking quota sample and an investigation of psychological correlates. Climatic Change. 168(3-4). 157 indexed citations breakdown →

10.

Hamann, Karen, et al.. (2021). Coaching for a Sustainability Transition: Empowering Student-Led Sustainability Initiatives by Developing Skills, Group Identification, and Efficacy Beliefs. Frontiers in Psychology. 12. 623972–623972. 20 indexed citations

11.

Reese, Gerhard, Karen Hamann, Lea Marie Heidbreder, et al.. (2020). SARS-Cov-2 and environmental protection: A collective psychology agenda for environmental psychology research. Journal of Environmental Psychology. 70. 101444–101444. 47 indexed citations

12.

Hamann, Karen, Eszter Kelemen, Matthew James Slater, et al.. (2020). Facilitating the EU market demand for legume-grain and -fodder as feeds. Zenodo (CERN European Organization for Nuclear Research). 1 indexed citations

13.

Frommberger, Ulrich, et al.. (2018). A feasibility study on violence prevention in outpatients with schizophrenia. International Journal of Law and Psychiatry. 58. 54–62.

14.

Hamann, Karen, et al.. (2016). Psychologie im Umweltschutz, Handbuch zur Förderung nachhaltigen Handelns. oekom verlag eBooks. 13 indexed citations

15.

Hamann, Karen, et al.. (2016). Psychology of Environmental Protection: Handbook for Encouraging Sustainable Actio. 1 indexed citations

16.

Hamann, Karen, et al.. (2015). Affixing the theory of normative conduct (to your mailbox): Injunctive and descriptive norms as predictors of anti-ads sticker use. Journal of Environmental Psychology. 44. 1–9. 61 indexed citations

17.

Reese, Gerhard, et al.. (2013). Sticker in the Box! Object-Person Distance and Descriptive Norms as Means to Reduce Waste. Ecopsychology. 5(2). 146–148. 9 indexed citations

18.

Hamann, Karen. (2012). Networks as Drivers for Innovation – Experiences from Food Networks in Canada and New Zealand. International journal on food system dynamics. 3(3). 264–272. 2 indexed citations

19.

Steinert, Tilman & Karen Hamann. (2012). External Validity of Studies on Aggressive Behavior in Patients with Schizophrenia: Systematic Review. Clinical Practice and Epidemiology in Mental Health. 8(1). 74–80. 5 indexed citations

20.

Hamann, Karen. (2012). Innovation and Development Support – Experiences from Food Networks in Canada and New Zealand. 32–40. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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