About the Authors

Claudia Rudolf von Rohr

claudiarvr@aim.uzh.ch

Affiliations Anthropological Institute & Museum, University of Zurich, Zurich, Switzerland, University Research Priority Program in Ethics, University of Zurich, Zurich, Switzerland

Sonja E. Koski

Affiliation Anthropological Institute & Museum, University of Zurich, Zurich, Switzerland

Judith M. Burkart

Affiliation Anthropological Institute & Museum, University of Zurich, Zurich, Switzerland

Clare Caws

Affiliation School of Natural Sciences and Psychology, John Moores University, Liverpool, United Kingdom

Orlaith N. Fraser

Affiliation Department of Cognitive Biology, University of Vienna, Vienna, Austria

Angela Ziltener

Affiliation Anthropological Institute & Museum, University of Zurich, Zurich, Switzerland

Carel P. van Schaik

Affiliation Anthropological Institute & Museum, University of Zurich, Zurich, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CR JB CvS. Performed the experiments: CR. Analyzed the data: CR SK. Contributed reagents/materials/analysis tools: CC OF AZ SK. Wrote the paper: CR SK JB CvS.