2025

Brockmeier, L. C., Mertens, L., Roitzheim, C., Radtke, T., Dingler, T., & Keller, J. (2025). Effects of an intervention targeting social media app use on well‐being outcomes: A randomized controlled trial. Applied Psychology: Health and Well‐Being, 17(1), e12646. https://doi.org/10.1111/aphw.12646

Brockmeier, L. C., Keller, J., Dingler, T., Paduszynska, N., Luszczynska, A., & Radtke, T. (2025). Planning a digital detox: Findings from a randomized controlled trial to reduce smartphone usage time. Computers in Human Behavior, 168, 108624. https://doi.org/10.1016/j.chb.2025.108624

Di Maio, S., Wilhelm, L. O., Fleig, L., Knoll, N., & Keller, J. (2025). Habit substitution toward more active commuting. Applied Psychology: Health and Well‐Being, 17(1), Article e12623. https://doi.org/10.1111/aphw.12623

Firnhaber, M., Varol, T., Gugushvili, N., Kwasnicka, D., Kleuters, P., Keller, J., Massar, K., de Visser, I., & ten Hoor, G. A. (2025). A systematic review and meta-analysis demonstrating a positive effect of green exercise interventions on mental well-being. Current Research in Ecological and Social Psychology, 9, 100244. https://doi.org/10.1016/j.cresp.2025.100244   

Ju, Q., Gan, Y., Peng, H., Li, B., Nie, S., & Schwarzer, R. (2025). Does stress compromise fruit and vegetable intake? A randomized controlled trial testing a model with planning as a mediator and stress as a moderator. Nutrition, 129, 112581. https://doi.org/10.1016/j.nut.2024.112581

Krzywicka, P., Kulis, E., Szczuka, Z., Siwa, M., Banik, A., Wietrzykowska, D., Kornafel, A., Zaleskiewicz, H., Misiakowska, J., Boberska, M., Knoll, N., Radtke, T., & Luszczynska, A. (2025). Adding planning strategies to an experiential and conceptual knowledge-based intervention: Does it help to reduce sedentary time? Psychology of Sport and Exercise, 77, 102782. https://doi.org/10.1016/j.psychsport.2024.102782

Kulis, E., Szczuka, Z., Banik, A., Siwa, M., Boberska, M., Wietrzykowska, D., Zaleskiewicz, H., Rhodes, R. E., Radtke, T., Schenkel, K., Knoll, N., Scholz, U., & Luszczynska, A. (2025). Individual, dyadic, collaborative planning, physical activity, and nutrition: A randomized controlled trial in parent–child dyads. Health Psychology, 44(2), 140–153. https://doi.org/10.1037/hea0001405

Kulis, E., Szczuka, Z., Banik, A., Siwa, M., Boberska, M., Zarychta, K., Zaleskiewicz, H., Knoll, N., Radtke, T., Scholz, U., Schenkel, K., & Luszczynska, A. (2025). Physical activity planning interventions, body fat and energy-dense food intake in dyads: ripple, spillover, or compensatory effects? Psychology & Health, 4(3), 433-453. https://doi.org/10.1080/08870446.2023.2233001

Lorbeer, N., Schwarzer, R., Keller, J., Di Maio, S., Domke, A., Armbrecht, G., Börst, H., Martus, P., Ertel, W., Luszczynska, A., & Knoll, N. (2025). Volitional processes in changing physical activity: A randomized controlled trial with individuals with knee osteoarthritis. Health Psychology, 44(6), 597–607. https://doi.org/10.1037/hea0001453

Schenkel, K., Nussbeck, F. W., Kerkhoff, D., Scholz, U., Keller, J., & Radtke, T. (2025). Digital generation: the association between daily smartphone app use and well-being. Behaviour & Information Technology, 44(10), 2456-2473. https://doi.org/10.1080/0144929x.2024.2406255

Schwarzer, R. (2025). Applied Psychology: Health and Well-Being-A farewell editorial. Applied psychology. Health and well-being, 17(1), e12604. https://doi.org/10.1111/aphw.12604

Siwa, M., Banik, A., Szczuka, Z., Kulis, E., Boberska, M., Wietrzykowska, D., Knoll, N., DeLongis, A., Knäuper, B., & Luszczynska, A. (2025). Provided and received positive and negative social control, relationship satisfaction, and sedentary behavior in parent-child dyads. Annals of Behavioral Medicine, 59(1), kaae092. https://doi.org/10.1093/abm/kaae092

Wietrzykowska, D., Krzywicka, P., Szczuka, Z., Kulis, E., Siwa, M., Kornafel, A., Zaleskiewicz, H., Boberska, M., Banik, A., Misiakowska, J., Knoll, N., Radtke, T., Rhodes, R., & Luszczynska, A. (2025). Tell me where you live, and I will predict your exercise levels: How self-regulatory action control, objective and perceived physical environment jointly explain physical activity time. British Journal of Health Psychology, 30(3), e70011. http://dx.doi.org/10.1111/bjhp.70011

Accepted for Publication/In Press/ epub first:

Berli, C., Villinger, K., Di Maio, S., Spliesgart, A., Stadler, G., Gawrilow, C., Bolger, N., Hankonen, N., Luszczynska, A., Rothman, A. J., Schneider, F., Simpson, J. A., Knoll, N.*, & Scholz, U.* (2025—accepted for publication). Compendium of dyadic behavior change techniques v2.0: Results from a Delphi Study. Annals of Behavioral Medicine. https://doi.org/10.1093/abm/kaaf080 *Shared last authorship.

Wilhelm, L. O., Knoll, N., Diering, L.-E., Kolodziejczak-Krupp, K., Maas, J., Schmidt, H., & Fleig, L. (2025 — in press). Daily self-efficacy, planning and social support explain leisure-time physical activity in working adults: Evidence for the cultivation hypothesis from an ambulatory assessment study. Health Psychology and Behavioral Medicine. https://doi.org/10.1080/21642850.2025.2576610