About the Authors

Catherine Hobaiter

clh42@st-andrews.ac.uk

Affiliations Centre for Social Learning and Cognitive Evolution and Scottish Primate Research Group, School of Psychology and Neuroscience, University of St Andrews, St Andrews, Scotland, Budongo Conservation Field Station, Masindi, Uganda

Anne Marijke Schel

Affiliations Department of Psychology, University of York, York, United Kingdom, Institute Jean Nicod, Ecole Normale Supérieure, Pavillon Jardin, Paris, France, Budongo Conservation Field Station, Masindi, Uganda

Kevin Langergraber

Affiliations Department of Anthropology, Boston University, Boston, Massachusetts, United States of America, Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany

Klaus Zuberbühler

Affiliations Centre for Social Learning and Cognitive Evolution and Scottish Primate Research Group, School of Psychology and Neuroscience, University of St Andrews, St Andrews, Scotland, Department of Comparative Cognition, Institute of Biology, University of Neuchatel, Neuchâtel, Switzerland, Budongo Conservation Field Station, Masindi, Uganda

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CH AS KL KZ. Performed the experiments: CH AS KL. Analyzed the data: CH AS KL KZ. Contributed reagents/materials/analysis tools: CH AS KL KZ. Wrote the paper: CH AS KL KZ.