A white-headed Capuchin monkey (Wikicommons) a group of monkeys was found to show a selective form of behavior once thought limited to homo sapiens, in which primates reject humans who keep engage in selfish behavior.The study, published in Nature Communications, explains:
"We find that the monkeys take less food from those who refuse stubbornly another is frequently calls for help. This negative effect of social assessment is robust through the conditions and tightly connected to explicit refusal to help. Evaluation of the potential availability based on third-party interactions so cannot be unique to humans. "
In the studio, two human beings acted out scenarios where one of them refused to help the other to open a glass jar containing a toy. A group of seven capuchin monkeys watched the interactions after having been instructed to receive food from only one person at a time.
When the two actors then offered food to monkeys, apes gravitated toward the man who showed cooperative behavior.
But why did the monkeys rejects food free human offer "selfish"? The study suggests that selfish behavior can be seen from monkeys as "dangerous" behavior.
"Explicit refusal to help is a signal that you are dangerous, you're negative," Kiley Hamlin, developmental psychologist at the University of British Columbia in Vancouver, Canada, said Scientific American.
Capuchin monkeys are highly social and cooperative, so the study's findings do not necessarily translate to all animals. But the possibility of measured behavior in other primates.
Another study published in January found that some chimpanzees have the ability to recognize the correctness, another trait previously thought limited to humans.
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