About the Authors

Bernard Wallner

bernard.wallner@univie.ac.at

Affiliations Department of Anthropology, University of Vienna, Vienna, Austria, Department of Behavioural Biology, University of Vienna, Vienna, Austria, Cognitive Science Research Platform, University of Vienna, Vienna, Austria

Martin Fieder

Affiliation Department of Anthropology, University of Vienna, Vienna, Austria

Horst Seidler

Affiliation Department of Anthropology, University of Vienna, Vienna, Austria

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BW MF. Analyzed the data: MF. Contributed reagents/materials/analysis tools: HS. Wrote the paper: BW MF.