Data from: Chimpanzees trust conspecifics to engage in low-cost reciprocity

Jan M. Engelmann, Esther Herrmann & Michael Tomasello
Many of humans' most important social interactions rely on trust, including most notably among strangers. But little is known about the evolutionary roots of human trust. We presented chimpanzees (Pan troglodytes) with a modified version of the human trust game—trust in reciprocity—in which subjects could opt either to obtain a small but safe reward on their own or else to send a larger reward to a partner and trust her to reciprocate a part of...
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