About the Authors

Katie E. Slocombe

ks553@york.ac.uk

Affiliation Department of Psychology, University of York, York, United Kingdom

Tanja Kaller

Affiliation Department of Psychology, University of York, York, United Kingdom

Josep Call

Affiliation Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany

Klaus Zuberbühler

Affiliation School of Psychology, University of St Andrews, St Andrews, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KS JC KZ. Performed the experiments: KS TK. Analyzed the data: KS TK. Contributed reagents/materials/analysis tools: JC. Wrote the paper: KS KZ.