ELSEVIER B.V. Journal 
Psychology of Sport and Exercise (PSE) | Quartile 1 (Q1) 

Kopp, P. M., Senner, V., Hugo M. Kehr & Gröpel, P. (2020). Achievement Motive, Autonomous Motivation, and Attendance at Fitness Center: A Longitudinal Prospective Study. Psychology of Sport and Exercise, Volume 51, 2020, 101758, ISSN 1469-0292, https://doi.org/10.1016/j.psychsport.2020.101758.

American Psycholgical Association (APA) Journal 
Sport, Exercise, and Performance Psychology (SEPP) | Quartile 1 (Q1)

Kopp, P. M., Senner, V., & Gröpel, P. (2020). Regular exercise participation and volitional competencies. Sport, Exercise, and Performance Psychology 9 (2), 2020, 232-243. https://doi.org/10.1037/spy0000197

Taylor & Francis Journal
Journal of Personality Assessment | Quartile (Q1)

Schönbrodt, F. D.; Hagemeyer, B.; Brandstätter, V.; Czikmantori, T.; Gröpel, P.; Hennecke, M.; Israel, L. S. F.; Janson, K.; Kemper, N.; Köllner, M.; Kopp, P. M.; Mojzisch, A.; Müller-Hotop, R.; Prüfer, J.; Quirin, M.; Scheidemann, B.; Schiestel, L.; Schulz-Hardt, S.; Sust, L.; Zygar, C.; Schultheiss, O. C.: Measuring Implicit Motives With the Picture Story Exercise (PSE): Databases of Expert-Coded German Stories, Pictures, and Updated Picture Norms. Journal of Personality Assessment, 2020. https://doi.org/10.1080/00223891.2020.1726936