Long-term data on chimpanzees adds another piece to the personality puzzle.
whereas others are loners. Some of the chimps had overbearing personalities, and some were more easy-going. And, of course, there are a handful that are more quick to pick fights with others.
Tanzanian field researchers performed personality assessments on the chimpanzees based on years of near-daily observations of how each animal interacted with others and behaved among the group. They found that a personality combination of high dominance and low conscientiousness helped the male chimpanzees fare better in life than the others, but it still doesn’t answer the evolutionary puzzle of why personality differences exist at all.
“Think of the personality traits that lead some people to peak in high school versus later in life,” Alexander Weiss, co-author and comparative psychologist at the University of Edinburgh,
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