About the Authors

Tonko W. Zijlstra

Roles Conceptualization, Formal analysis, Methodology, Software, Writing – original draft, Writing – review & editing

Current address: Cognitive Psychology Unit, Institute of Psychology, Leiden University, Leiden, The Netherlands

Affiliation Animal Behaviour and Cognition (formerly Animal Ecology), Department Biology, Utrecht University, Utrecht, The Netherlands

Han de Vries

Roles Conceptualization, Methodology, Software, Writing – original draft, Writing – review & editing

Affiliation Animal Behaviour and Cognition (formerly Animal Ecology), Department Biology, Utrecht University, Utrecht, The Netherlands

Elisabeth H. M. Sterck

Roles Conceptualization, Methodology, Writing – original draft, Writing – review & editing

E.H.M.Sterck@uu.nl

Affiliations Animal Behaviour and Cognition (formerly Animal Ecology), Department Biology, Utrecht University, Utrecht, The Netherlands, Ethology Research, Animal Science Department, Biomedical Primate Research Centre, Rijswijk, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.