Gao, Jie
Su, Yanjie
Tomonaga, Masaki
Matsuzawa, Tetsuro
Funding for this research was provided by:
Japan Society for the Promotion of Science (16H06283, 15H05709, JSPS core-to-core CCSN, JSPS-LGP-U04)
Article History
Received: 22 February 2017
Accepted: 18 July 2017
First Online: 10 August 2017
Compliance with ethical standards
:
: J. G., Y. S., M. T., and T. M. designed the experiment; J. G., T. M., and M. T. collected the chimpanzee data; J. G. collected the child data; and J. G., Y. S., M. T., and T. M. wrote the manuscript.
: The authors declare that they have no conflicts of interest.
: The research proposal for the chimpanzees was approved by the Animal Welfare and Animal Care Committee of KUPRI and by the Animal Research Committee of Kyoto University (Nos. 2015-044, 2016-064). All procedures adhered to the Japanese Act on the Welfare and Management of Animals. The research proposal for the experiment with children was approved by the Human Research Ethics Committee of KUPRI (No. 2016-011).