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Chimpanzees are indifferent to the welfare of unrelated group members
Humans are an unusually prosocial species—we vote, give blood, recycle, give tithes and punish violators of social norms. Experimental evidence indicates that people willingly incur costs to helpExpand
Hand preferences for coordinated bimanual actions in 777 great apes: implications for the evolution of handedness in hominins.
Whether or not nonhuman primates exhibit population-level handedness remains a topic of considerable scientific debate. Here, we examined handedness for coordinated bimanual actions in a sample ofExpand
Mechanisms underlying responses to inequitable outcomes in chimpanzees, Pan troglodytes
Several species of nonhuman primates respond negatively to inequitable outcomes, a trait shared with humans. Despite previous research, questions regarding the response to inequity remain. In thisExpand
Prolonged myelination in human neocortical evolution
Nerve myelination facilitates saltatory action potential conduction and exhibits spatiotemporal variation during development associated with the acquisition of behavioral and cognitive maturity.Expand
Developing a comprehensive and comparative questionnaire for measuring personality in chimpanzees using a simultaneous top‐down/bottom‐up design
One effective method for measuring personality in primates is to use personality trait ratings to distill the experience of people familiar with the individual animals. Previous rating instrumentsExpand
Chimpanzees do not take advantage of very low cost opportunities to deliver food to unrelated group members
We conducted experiments on two populations of chimpanzees, Pan troglodytes, to determine whether they would take advantage of opportunities to provide food rewards to familiar group members atExpand
The Distribution and Development of Handedness for Manual Gestures in Captive Chimpanzees (Pan troglodytes)
This article describes the distribution and development of handedness for manual gestures in captive chimpanzees. Data on handedness for unimanual gestures were collected in a sample of 227 captiveExpand
Use of primates in research: A global overview
We assessed the use of nonhuman primates and nonhuman primate biological material in research by reviewing studies published in 2001 in peer‐reviewed journals. The number and species of primatesExpand
Experimental studies of traditions and underlying transmission processes in chimpanzees
Multiple regional differences in tool use have been identified among wild chimpanzees, Pan troglodytes, but the hypothesis that these represent traditions, transmitted through social learning, isExpand