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Corresponding author Malini Suchak, suchakm@canisius.edu
Malini Suchak conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.
Timothy M. Eppley and Matthew W. Campbell conceived and designed the experiments, performed the experiments, reviewed drafts of the paper.
Frans B.M. de Waal conceived and designed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.
We would like to thank Victoria Horner, Darby Proctor, Zanna Clay, Harold Gouzoules, Sarah Brosnan, Monica Capra, and Philippe Rochat for helpful discussions; Julia Watzek for statistical help; the Veterinary and Animal Care staff at the Yerkes National Primate Research Center for maintaining the health of our research subjects.
The authors declare there are no competing interests.
The study was supported by the Living Links Center, Emory’s PRISM Program (NSF GK12 #DGE0536941), Emory’s Dean’s Teaching Fellowship program, Emory’s FIRST program (NIH/NIGMS(USA) IRACDA grant #K12GM00680 to MWC), the Expanding the Science and Practice of Gratitude Project of the Greater Good Science Center at the University of California-Berkeley, and the base grant of the National Institutes of Health to the YNPRC from the National Center for Research Resources PR51RR165 (currently supported by the Office of Research Infrastructure Programs/ODP51OD11132).
© 2014 Suchak et al.