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- W2021996989 abstract "Several recent studies show that animal friendships, like human friendships, are durable and have fitness benefits by increasing survival, infant survival, or reproductive success. However, the determinants of especially non-kin friendships are unclear. Human non-kin friendships are partly determined by similarity in personality. We investigated personality similarity of friends in 38 captive chimpanzees. Within-subject comparisons revealed that friends are more similar than non-friends in their Sociability and Boldness. Subsequent analyses, including both kin- and non-kin dyads, revealed higher similarity in Sociability among all individuals who sat in contact more often, while in Boldness and Grooming Equity the positive effect of similarity was only found in non-kin individuals’ contact-sitting. Our results show that similar to humans, chimpanzees’ friendships are related to homophily in certain personality characteristics, particularly those relevant for socio-positive and cooperative behaviour. We suggest that having friends similar to self in personality decreases uncertainty in interactions by promoting reliability especially in cooperative contexts, and is consequently adaptive. Further, we suggest that homophily in human friendships dates back at least to our last common ancestor with chimpanzees." @default.
- W2021996989 created "2016-06-24" @default.
- W2021996989 creator A5002390386 @default.
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- W2021996989 date "2014-01-01" @default.
- W2021996989 modified "2023-10-04" @default.
- W2021996989 title "Chimps of a feather sit together: chimpanzee friendships are based on homophily in personality" @default.
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- W2021996989 doi "https://doi.org/10.1016/j.evolhumbehav.2013.08.008" @default.
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