This article by : Deutsches Primatenzentrum (DPZ)/German Primate Center originally appeared in Science Daily
Behavioral scientists tested biological principle on free-living Assamese macaques. “We assume that personality homophily is a general biological principle that is deeply rooted in the evolution of humans and animals,” said Oliver Schülke, scientist in the Department of Behavioral Ecology at the University of Göttingen and head of the study. Individuals whose friends have a similar character have an advantage. “One reason might be that similar personalities also have similar needs, understand each other particularly well, communicate effectively and are therefore more successful cooperation partners,” said Schülke.
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