About the Authors

Sarah F. Brosnan

To whom correspondence should be addressed. E-mail: sbrosnan@gsu.edu

Affiliations Department of Anthropology, Emory University, Atlanta, Georgia, United States of America, Michale E. Keeling Center for Comparative Medicine and Research, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America, Language Research Center, Georgia State University, Atlanta, Georgia, United States of America

Mark F. Grady

Affiliation University of California, Los Angeles (UCLA) Center for Law and Economics, Los Angeles, California, United States of America

Susan P. Lambeth

Affiliation Michale E. Keeling Center for Comparative Medicine and Research, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America

Steven J. Schapiro

Affiliation Michale E. Keeling Center for Comparative Medicine and Research, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America

Michael J. Beran

Affiliation Language Research Center, Georgia State University, Atlanta, Georgia, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SB MG. Performed the experiments: SB MB SL. Analyzed the data: SB. Wrote the paper: SB MB MG. Other: Research support: SS SL.