About the Authors

Michael Haslam

michael.haslam@rlaha.ox.ac.uk

Affiliation Research Laboratory for Archaeology and the History of Art, University of Oxford, Oxford, United Kingdom

Michael D. Gumert

Affiliation Division of Psychology, School of Humanities and Social Sciences, Nanyang Technological University, Singapore, Singapore

Dora Biro

Affiliation Department of Zoology, University of Oxford, Oxford, United Kingdom

Susana Carvalho

Affiliation Research Laboratory for Archaeology and the History of Art, University of Oxford, Oxford, United Kingdom

Suchinda Malaivijitnond

Affiliation Primate Research Unit, Department of Biology, Chulalongkorn University, Bangkok, Thailand

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MH MG SM. Performed the experiments: MH MG DB. Analyzed the data: MH MG DB. Wrote the paper: MH MG DB SC SM.