Research at the CEP  What do we do here?

New! What explains why humans are so generous, even in one-shot interactions? The evolution of direct reciprocity under uncertainty can explain human generosity in one-shot encounters by Andrew W. Delton, Max M. Krasnow, Leda Cosmides & John Tooby in Proceedings of the National Academy of Sciences, 2011. Click here for more

Click here to see our reply to a recent commentary on our article.

Click here to see a Science letter by Delton, Krasnow, Cosmides, & Tooby on alternative approaches to the evolution of cooperation.

What explains the origins of individual differences in personality? Does adaptively-patterned personality variation arise via specific gene polymorphisms (as predicted by evolutionary genetic models) or universal mechanisms of facultative calibration (as predicted by adaptationist models)? See The Origins of Extraversion: Joint Effects of Facultative Calibration and Genetic Polymorphism by Aaron W. Lukaszewski and James R. Roney in Personality and Social Psychology Bulletin, March 2011, 37(3) 409–421.

Cross-cultural evidence for a domain specific adaptation in human spatial cognition for plant food gathering. See Cognitive adaptations for gathering-related navigation in humans by Max Krasnow, Danielle Truxaw, Steven Gaulin, Joshua New, Hiroki Ozono, Shota Uono, Taiji Ueno, and Kazusa Minemoto in Evolution and Human Behavior, January 2011 32 (2011) 1–12.

Does the human mind contain adaptations for integrating newcomers into coalitions? See On the perception of newcomers: Toward an evolved psychology of intergeneration coalitions by Aldo Cimino and Andrew Delton in Human Nature (21:186–202)and Exploring the evolved concept of newcomer: Experimental tests of a cognitive model by Andrew Delton and Aldo Cimino in Evolutionary Psychology 8(2): 317-335.

Cross cultural research demonstrates that the male voice contains cues of fighting ability and upper body strength.  See Adaptations in humans for assessing physical strength from the voice by Aaron Sell, Gregory Bryant, Leda Cosmides, John Tooby, Daniel Sznycer, Christopher von Rueden, Andre Krauss and Michael Gurven in Proceedings of the Royal Society London, (Biological Sciences), 277, 3509-3518. 

Just how specialized is the cheater detection mechanism?  New research shows that it is activated only when the search for rule violations has the potential to reveal someone’s character—their propensity to cheat. It does not search for violations of social exchange rules when these are accidental, when they do not benefit the violator, or when the situation would make cheating difficult.  See Adaptive specializations, social exchange, and the evolution of human intelligence by Cosmides, L., Barrett, C., & Tooby, J. in Proceedings of the National Academy of Sciences, 107, 9007-9014, May 2010, .  click here for more

Why does anger exist, what is its evolved function, and why are some people more anger prone than others? See Formidability and the logic of human anger by Aaron Sell, Leda Cosmides, and John Tooby, in Proceedings of the National Academy of Sciences, 106(35) 15073–15078, September 2009. Click here for more

Theories of animal conflict predict that humans should have an evolved specialization for assessing fighting ability. See Human adaptations for the visual assessment of strength and fighting ability from the body and face by Aaron Sell, Leda Cosmides, John Tooby, Daniel Sznycer, Christopher von Rueden, and Michael Gurven in Proceedings of the Royal Society London, (Biological Sciences), 276, 575–584. October 2008. Click here for more

Does the presence of status rivals affect risky decision-making in men? Are motivation and cognition inextricably bound together? See Relative Status Regulates Risky Decision-Making about Resources in Men: Evidence for the Co-Evolution of Motivation and Cognition by Elsa Ermer, Leda Cosmides, and John Tooby, in Evolution and Human Behavior, 29, 106-118 (2008).

Category-Specific Attention for Animals Reflects Ancestral Priorities, not Expertise” by Joshua New, Leda Cosmides, and John Tooby. In the October 16, 2007 Proceedings of the National Academy of Sciences, Vol. 104, 16598-16603. Click here for discussion

Spatial Adaptations for Plant Foraging: Women Excel and Calories Count by Joshua New, Max Krasnow, Danielle Truxaw, and Steven J.C. Gaulin. In Proceedings of the Royal Society, Biological Sciences 274, 2679-2684 (2007). Click here for more, including Krasnow, Truxaw, New & Gaulin's response to Brumfield et al. in Science...

The Architecture of Human Kin Detection by Debra Lieberman, John Tooby, & Leda Cosmides. Nature, 445, 727-731 (Feb 15, 2007). Click here for more

Does reasoning about social exchange engage different brain areas than other kinds of reasoning?  To find out, see:
Ermer, E., Guerin, S., Cosmides, L., Tooby, J., & Miller, M. (2006) Theory of mind broad and narrow: Reasoning about social exchange engages ToM areas, precautionary reasoning does not. Social Neuroscience, 1 (3-4), 196-219.

The Center for Evolutionary Psychology has a new, sister center in Japan, the Center for the Sociality of Mind, at Hokkaido University.

Interview with Leda Cosmides Click here