About the Authors

Orlaith N. Fraser

orlaith.fraser@univie.ac.at

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

Thomas Bugnyar

Affiliations Department of Cognitive Biology, University of Vienna, Vienna, Austria, Konrad Lorenz Forschungstelle, Grünau, Austria

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the study: TB. Analyzed the data: ONF. Wrote the paper: ONF. Provided theoretical framework: ONF. Collected data: TB.