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Monkeys Enjoy Giving To Others, Study Finds

Date:
August 25, 2008
Source:
Emory University
Summary:
Researchers have shown capuchin monkeys, just like humans, find giving to be a satisfying experience. This finding comes on the coattails of a recent imaging study in humans that documented activity in reward centers of the brain after humans gave to charity. Empathy in seeing the pleasure of another's fortune is thought to be the impetus for sharing, a trait this study shows transcends primate species.

Capuchin monkeys, just like humans, find giving to be a satisfying experience, new evidence suggests.
Credit: iStockphoto/Robert Deal

Researchers at the Yerkes National Primate Research Center, Emory University, have shown capuchin monkeys, just like humans, find giving to be a satisfying experience. This finding comes on the coattails of a recent imaging study in humans that documented activity in reward centers of the brain after humans gave to charity.

Empathy in seeing the pleasure of another's fortune is thought to be the impetus for sharing, a trait this study shows transcends primate species.

Frans de Waal, PhD, director of the Living Links Center at the Yerkes Research Center, and Kristi Leimgruber, research specialist, led a team of researchers who exchanged tokens for food with eight adult female capuchins. Each capuchin was paired with a relative, an unrelated familiar female from her own social group or a stranger (a female from a different group).

The capuchins then were given the choice of two tokens: the selfish option, which rewarded that capuchin alone with an apple slice; or the prosocial option, which rewarded both capuchins with an apple slice. The monkeys predominantly selected the prosocial token when paired with a relative or familiar individual but not when paired with a stranger.

"The fact the capuchins predominantly selected the prosocial option must mean seeing another monkey receive food is satisfying or rewarding for them," said de Waal. "We believe prosocial behavior is empathy based. Empathy increases in both humans and animals with social closeness, and in our study, closer partners made more prosocial choices. They seem to care for the welfare of those they know," continued de Waal.

de Waal and his research team next will attempt to determine whether giving is self-rewarding to capuchins because they can eat together or if the monkeys simply like to see the other monkey enjoying food.

The research was supported by a grant from the National Science Foundation and by the Yerkes base grant from the National Institutes of Health.


Story Source:

The above story is based on materials provided by Emory University. Note: Materials may be edited for content and length.


Journal Reference:

  1. Frans B. M. de Waal; Kristin Leimgruber; Amanda R. Greenberg. Giving is self-rewarding for monkeys. Proceedings of the National Academy of Sciences, [link]

Cite This Page:

Emory University. "Monkeys Enjoy Giving To Others, Study Finds." ScienceDaily. ScienceDaily, 25 August 2008. <www.sciencedaily.com/releases/2008/08/080825175005.htm>.
Emory University. (2008, August 25). Monkeys Enjoy Giving To Others, Study Finds. ScienceDaily. Retrieved September 2, 2014 from www.sciencedaily.com/releases/2008/08/080825175005.htm
Emory University. "Monkeys Enjoy Giving To Others, Study Finds." ScienceDaily. www.sciencedaily.com/releases/2008/08/080825175005.htm (accessed September 2, 2014).

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