About the Authors

Peter DeScioli

descioli@psych.upenn.edu

Affiliation University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Robert Kurzban

Affiliation University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PD RK. Performed the experiments: PD RK. Analyzed the data: PD. Wrote the paper: PD RK.