Correspondence: Chimpanzee helping is real, not a byproduct

• Alicia P. Melis,
• Jan M. Engelmann,
• Felix Warneken

Affiliations

Alicia P. Melis

Warwick Business School, The University of Warwick

Jan M. Engelmann

Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology

Felix Warneken

Department of Psychology, University of Michigan