facebook
twitter
rss
account
search
search
 

Chimps choose more rationally than humans

Oct. 8, 2007 at 2:07 PM   |   Comments

LEIPZIG, Germany, Oct. 8 (UPI) -- German researchers have demonstrated chimpanzees make choices that protect their self-interest more consistently than do humans.

Researchers from the Max Planck Institute of Evolutionary Anthropology in Leipzig studied the chimp's choices by using an economic game with two players. In the game, a human or chimpanzee who receives something of value can offer to share it with another.

If the proposed share is rejected, neither player gets anything.

Humans typically make offers close to 50 percent of the reward. They also reject as unfair offers of significantly less than half of the reward, even though this choice means they get nothing.

The study, however, showed chimpanzees reliably made offers of substantially less than 50 percent, and accepted offers of any size, no matter how small.

The researchers concluded chimpanzees do not show a willingness to make fair offers and reject unfair ones. In this way, they protect their self interest and are unwilling to pay a cost to punish someone they perceive as unfair.

The study appeared in the Oct. 5 issue of the journal Science.

© 2007 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Most Popular
1
Earth's magnetic field may soon flip, according to new data Earth's magnetic field may soon flip, according to new data
2
Wisconsin shuts down three wolf hunting zones, two remain open Wisconsin shuts down three wolf hunting zones, two remain open
3
Deforestation in the Amazon has increased 190 percent, satellites show Deforestation in the Amazon has increased 190 percent, satellites show
4
Three Mars probes hide behind planet, avoid comet debris Three Mars probes hide behind planet, avoid comet debris
5
Japanese man who 3D printed guns sentenced to two years in prison Japanese man who 3D printed guns sentenced to two years in prison
Trending News
Around the Web
x
Feedback