Fraunhofer Institute for Systems and Innovation Research ISI
Fraunhofer Institute for Systems and Innovation Research ISI

Dr. Josephine Tröger

Researcher

Since April 2021, Dr. Josephine Tröger has been working as a researcher and project manager in the Department of Energy Policy and Energy Markets in the Business Unit Actors and Acceptance in the Energy System.

As part of her research activities, Josephine Tröger focuses intensively on environmental attitudes, particularly sufficiency orientation in consumer behaviour. She conducts research on attitude changes and interventions to promote sufficiency-oriented behaviour. She uses both quantitative and experimental methods of empirical social research to evaluate the effectiveness of these interventions and gain sound insights.

Josephine Tröger studied psychology (graduate degree) with a minor in Literature, Arts and Media at the Universities of Konstanz, Monterrey (Mexico) and Catania (Italy). From 2012 to 2016, she worked as a research assistant in the Interdisciplinary Research Group on Environmental Issues at the University of Koblenz-Landau. From 2018 to 2021, she was a research assistant and lecturer in the Environmental Psychology Research Group at the University of Koblenz-Landau, where she completed her PhD on sufficiency orientation as a key to socio-ecological transformation and worked on several other research projects. In addition to expertise in Environmental Psychology, she gained professional experience in the fields of science communication and event management. 

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    • ESPR Label – Develop a clear and effective label design for European Consumers
    • MobilKULT - Panel study of mobility habits in the German states of Baden-Württemberg and Mecklenburg-Western Pomerania
    • Car-goNE City - Cargo Bikes and Neighbourhood Engagement in the 15-Minute City
    • KAMO: Karlsruhe Mobility Leistungszentrum/Profilregion (formerly: Profilregion Mobilitätssysteme Karlsruhe)
    • Climate policy Hessen: Attitudes of the population of Hessen toward socially just climate policy

  • Lecturer for Environmental Psychology and project-oriented seminars in the interdisciplinary degree program “People and the Environment” (B.A.) as well as in the psychology degree program (M.A.) at the University Koblenz-Landau

    • Helferich, M.; Tröger, J. (2026). Social acceptance factors of mobility-related policy packages. Transportation Research Part A: Policy and Practice, 203.
    • Bagheri, M.; Tröger, J.; Freudenberg, C. (2024): Investigating the influence of current trends and behaviours on household structures and housing consumption patterns. In: Consumption and Society, pp. 1–23. https://doi.org/10.1332/27528499Y2024D000000025.
    • Helferich, M.; Tröger, J.; Dütschke, E. (2024): The role of automobility engagement for car use and car use reduction intentions in Germany. Transportation Research Part F. In: Psychology and Behaviour, 106, pp. 199-214. https://doi.org/10.1016/j.trf.2024.08.002.
    • Helferich, M.; Tröger, J.; Stephan, A.; Preuß, S.; Pelka, S.; Stute, J.; Plötz, P. (2024): Tariff option preferences for smart and bidirectional charging: Evidence from battery electric vehicle users in Germany. In: Energy Policy, 192, p. 114240. https://doi.org/10.1016/j.enpol.2024.114240
    • Helferich, M.; Tröger, J.; Dütschke, E. (2024): Deutschlandticket - Impulsgeber für nachhaltige Mobilität? Ergebnisse aus der MobilKULT-Panelstudie zu Mobilitätsgewohnheiten. Internationales Verkehrswesen, 76(2), 30–36. https://doi.org/10.24053/IV-2024-0022
    • Heidbreder, L. M.; Tröger, J.; Schmitt, M. (2022): Exploring the psychological antecedents of private and public sphere behaviours to reduce household plastic consumption. In: Environment, Development and Sustainability. Advance online publication. https://doi.org/10.1007/s10668-022-02186-w.
    • Tröger, J.; Menzel, C. (2021): Widerstandsfähig in einem sich wandelnden Klima? Evangel Magazin für missionarisches Pastoral, 1. https://www.euangel.de/ausgabe-1-2021/resilienz/widerstandsfaehig-in-einem-sich-wandelnden-klima/druck.html
    • Tröger, J.; Wullenkord, M. C.; Barthels, C.; Steller, R. (2021): Can Reflective Diary-Writing Increase Sufficiency-Oriented Consumption? A Longitudinal Intervention Addressing the Role of Basic Psychological Needs, Subjective Well-Being, and Time Affluence. Sustainability, 13(9), 4885, https://doi.org/10.3390/su13094885.
    • Wullenkord, M.; Tröger, J.; Hamann, K. R.; Loy, L.; Reese, G. (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, Article number 20 (2021), https://doi.org/10.1007/s10584-021-03234-6.
    • Loy, L. S.; Tröger, J.; Prior, P.; Reese, G. (2021): Global Citizens – Global Jet Setters? The Relation Between Global Identity, Sufficiency Orientation, Travelling, and a Socio-Ecological Transformation of the Mobility System. Frontiers in psychology, 12, https://doi.org/10.3389/fpsyg.2021.622842.
    • Tröger, J.; Reese, G. (2021): Talkin’ bout a revolution: an expert interview study exploring barriers and keys to engender change towards societal sufficiency orientation. Sustainability Science, 1-14, https://doi.org/10.1007/s11625-020-00871-1.
    • Tröger, J.; Wullenkord, M. (2020): Bedingungsloses Grundeinkommen – ein Schlüssel zur Suffizienz?. Ökologisches Wirtschaften 33(4), 20-21, https://doi.org/10.14512/OEW350420.
    • Reese, G.; Hamann, K. R.; Heidbreder, L. M.; Loy, L. S.; Menzel, C.; Neubert, S.; Tröger, J.; Wullenkord, M. C. (2020): SARS-Cov-2 and environmental protection: A collective psychology agenda for environmental psychology research. Journal of Environmental Psychology, 70, 101444, https://doi.org/10.1016/j.jenvp.2020.101444.
    • Reese, G.; Drews, S.; Tröger, J. (2019): Warum haben wir Angst vor dem Weniger? Umweltpsychologie und Suffizienz im Fokus. In: Voget-Kleschin, L.; Bossert, L.; Meisch, S. (eds.): Damit gutes Leben mit der Natur einfacher wird. Suffizienzpolitik für Naturbewahrung (pp. 135–149). Metropolis-Verlag GmbH.
    • Steinmetz, Z.; Wollmann, C.; Schaefer, M.; Buchmann, C.; David, J.; Tröger, J.; Munoz, K.; Frör, O.; Schaumann, G. E. (2016): Plastic mulching in agriculture. Trading short-term agronomic benefits for long-term soil degradation? Science of the total environment, 550, 690-705, https://doi.org/10.1016/j.scitotenv.2016.01.153.