About the Authors
- Jorg J. M. Massen, Dorith A. Vermunt, Elisabeth H. M. Sterck
- Department of Behavioural Biology, Utrecht University, Utrecht, The Netherlands
- Jorg J. M. Massen
- Department of Cognitive Biology, University of Vienna, Vienna, Austria
- Elisabeth H. M. Sterck
- Ethology Research, Biomedical Primate Research Centre, Rijswijk, The Netherlands
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JM. Performed the experiments: JM DV. Analyzed the data: JM. Contributed reagents/materials/analysis tools: JM. Wrote the paper: JM DV ES.