Ehm... kutan kieu, geuning sarua egoisna!
Published online: 26 October 2005; |
doi:10.1038/news051024-7
Chimps fall short on friendship
Apes don't give a monkey's about their pals, says US
team.
Michael Hopkin
You can tell a lot about someone from how they treat
their friends. As the results of a study of captive
chimpanzees seem to show, our ape cousins are only in
it for themselves.
The study, led by Joan Silk of the University of
California, Los Angeles, looked for evidence that
chimpanzees (Pan troglodytes) will help other members
of their group. But the apes seem to be indifferent at
best to the welfare of their fellows.
Silk and her colleagues presented captive chimps with
an apparatus that allowed them to get food by pulling
on one of two ropes. Choosing one of the ropes meant
that the chimp could haul in a tasty titbit. Selecting
the other yielded exactly the same reward, but another
chimp in an adjacent cage also received a morsel to
eat.
All they had to do was be nice.
Joan Silk
University of California, Los Angeles
Given that the chimp in charge got the same food
reward regardless of which rope was selected, one
might expect them to have shown some compassion and
chosen the one that gave food to their companion too.
"All they had to do was be nice," Silk says.
But the 29 chimps tested were no more likely to choose
the generous option than the selfish one, Silk and her
colleagues report in this week's Nature1. This shows
that the apes are not motivated to help others as a
matter of course, they conclud
Nyambung di>>>
http://www.nature.com/news/2005/051024/full/051024-7.html
Baktos,
Rahman, Wassenaar/NL
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