Leonard Stijn Peperkoorn

L.S. Peperkoorn

Leonard Stijn was fortunate to study Social Psychology at the VU Amsterdam. After being a research assistant for one year he started his PhD, working with prof. Daniel Balliet and prof. Paul van Lange on cooperation. Over the years he participated in various projects as diverse as friendship and romantic relationships, testosterone and aggression, the red effect on attraction, determinants of sports outcomes, nonverbal communication, charity and volunteering, and his great delight: group size and cooperation.


Wu, J., Balliet, D., Peperkoorn, L.S., Romano, A., & Van Lange, P.A.M. (2020). Cooperation in groups of different sizes: The effects of punishment and reputation-based partner choice. Frontiers in Psychology, 10, 1–13. doi:10.3389/fpsyg.2019.02956

Pollet, T.V., Costello, J., Groeneboom, L., Peperkoorn, L.S., & Wu, J. (2019). Do red objects enhance sexual attractiveness? No evidence from two large replications. Displays, 56, 23–29. doi:10.1016/j.displa.2018.10.008

Eriksson, K., Strimling, P., Andersson, P.A., Aveyard, M., Brauer, M., Gritskov, V., Kiyonari, T., Kuhlman, D.M., Maitner, A., Manesi, Z., Molho, C., Peperkoorn, L.S., Rizwan, M., Stivers, A.W., Tian, Q., Van Lange, P.A.M., Vartanova, I., Wu, J., & Yamagishi, T. (2017). Cultural universals and cultural differences in meta-norms about peer punishment. Management and Organization Review, 13, 851–870. doi: 10.1017/mor.2017.42

Peperkoorn, L.S., Roberts, S.C., & Pollet, T. V. (2016). Revisiting the red effect on attractiveness and sexual receptivity: No effect of the color red on human mate preferences. Evolutionary Psychology, 14, 1–13. doi: 10.1177/1474704916673841

Pollet, T. V., & Peperkoorn, L.S. (2013). Fading red? No evidence that color of trunks influences outcomes in the Ultimate Fighting Championship (UFC). Frontiers in Psychology, 4, 1–2. doi: 10.3389/fpsvg.2013.00643

Contact Information

VU Amsterdam
Faculty of Behavioral and Movement Sciences
Department of Experimental and Applied Psychology
Van der Boechorststraat 1
1081 BT Amsterdam
The Netherlands

E  l.s.peperkoorn@vu.nl
T +31 20 59 82205