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Chimps And Humans Share Sense Of Fair Play
Chimpanzees and humans possess a similar sense of fairness, it seems.
Scientists watched both species taking part in a game in which two players had to decide how to divide a reward between them.
In the tests, bananas acted as rewards for the chimps and stickers for the children, who were aged between two and seven.
Known as the 'Ultimatum Game', after the first player proposes how to divide the reward between the two players, the second player can either accept or reject the proposal.
If this player objects, neither player receives anything. If they accept, the reward is split according to the proposal.
The children tended to offer fair proportions, typically half of the reward, to their partners.
Observers discovered almost exactly the same pattern of behaviour among the group of chimps.
But in both groups, the sense of fair play only went so far.
When it was possible to be selfish without any chance of the proposal being rejected, charity tended to be forgotten.
Dr Frans de Waal, from the Yerkes National Primate Research Centre in Atlanta, said: "Until our study, the behavioural economics community assumed the Ultimatum Game could not be played with animals, or that animals would choose only the most selfish option while playing.
"We've concluded that chimpanzees not only get very close to the human sense of fairness, but the animals may actually have exactly the same preferences as our own species."
Scientists believe the findings, which are published in the journal Proceedings of the National Academy of Sciences, suggest that sensitivity to reward distributions may help chimps reap the benefits of co-operation in the wild.
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Marc Colin Delaunay
I bet if you raised the age in adult humans they would notice higher levels of selfishness !!!!