About the Authors

Aaron D. Blackwell

ablackwell@isber.ucsb.edu

Affiliations Integrative Anthropological Sciences, University of California, Santa Barbara, Santa Barbara, California, United States of America, Department of Anthropology, University of Oregon, Eugene, Oregon, United States of America, Institute of Cognitive and Decision Sciences, University of Oregon, Eugene, Oregon, United States of America

Michael D. Gurven

Affiliation Integrative Anthropological Sciences, University of California, Santa Barbara, Santa Barbara, California, United States of America

Lawrence S. Sugiyama

Affiliations Department of Anthropology, University of Oregon, Eugene, Oregon, United States of America, Institute of Cognitive and Decision Sciences, University of Oregon, Eugene, Oregon, United States of America

Felicia C. Madimenos

Affiliations Department of Anthropology, University of Oregon, Eugene, Oregon, United States of America, Institute of Cognitive and Decision Sciences, University of Oregon, Eugene, Oregon, United States of America

Melissa A. Liebert

Affiliations Department of Anthropology, University of Oregon, Eugene, Oregon, United States of America, Institute of Cognitive and Decision Sciences, University of Oregon, Eugene, Oregon, United States of America

Melanie A. Martin

Affiliation Integrative Anthropological Sciences, University of California, Santa Barbara, Santa Barbara, California, United States of America

Hillard S. Kaplan

Affiliation Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, United States of America

J. Josh Snodgrass

Affiliations Department of Anthropology, University of Oregon, Eugene, Oregon, United States of America, Institute of Cognitive and Decision Sciences, University of Oregon, Eugene, Oregon, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ADB MDG LSS HSK JJS. Performed the experiments: ADB MDG LSS FCM MAL MAM HSK JJS. Analyzed the data: ADB FCM MAL MAM. Contributed reagents/materials/analysis tools: MDG LSS HSK JSS. Wrote the paper: ADB MDG JJS.