Simão, J., & Todd, P. M. (2001). A model of human mate choice with courtship that predicts population patterns. In J. Kelemen & P. Sosik (Eds.), Advances in Artificial Life: Proceedings of the 6th European Conference in Artificial Life (ECAL) (pp. 377–380). Springer.

Todd, P. M., & Kirby, S. (2001). I like what I know: How recognition-based decisions can structure the environment. In Advances in Artificial Life: Proceedings of the 6th European Conference in Artificial Life (ECAL) (pp. 166–176). Springer.

Gummerum, M. (2001). The development of the friendship concept in different cultures: A comparison between China, the GDR, Iceland and Russia [Diploma Thesis, Freie Universität Berlin].

Wilke, A. (2001). The rationality of emotions: Emotions as adaptations [Diploma Thesis, Freie Universität Berlin].

Fiddick, L. (2001). Alone in the cognitive niche [Review of the book The descent of mind: Psychological perspectives on hominid evolution]. Contemporary Psychology, 46(6), 567–570.

Hoffrage, U. (2001). Does knowing "who is rational" tell us why and when people are irrational? [Review of the book Who is rational? Studies of individual differences in reasoning]. Theory & Psychology, 11(6), 852–855.

Todd, P. M., & Gigerenzer, G. (2001). Putting naturalistic decision making into the adaptive toolbox [Review of the article Taking stock of naturalistic decision making]. Journal of Behavioral Decision Making, 14(5), 381–382.