NDLI: Longitudinal stability of friendships in rhesus monkeys (Macaca mulatta): individual- and relationship-level effects.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Weinstein, Tamara A. R. Capitanio, John P.
Description	Country affiliation: United States Author Affiliation: Weinstein TA ( Department of Psychology, University of California, Davis, CA, USA. tamara9708@gmail.com)
Abstract	The longevity of children's friendships is influenced by a multitude of individual- and relationship-level attributes, but little is known about the factors that impact friendship maintenance in nonhuman primate juveniles. We investigated whether the following predicted the longitudinal stability of friendships in juvenile rhesus monkeys (Macaca mulatta): (1) individual characteristics including sex, dominance rank, matriline size, and temperament; and (2) relationship characteristics including kinship, reciprocity, complexity, and similarity between friends in sex, rank, and temperament. We recorded affiliative interactions of 29 two-year-old rhesus monkeys, previously observed as yearlings, at the California National Primate Research Center. Friends were defined as peers with whom subjects spent more time affiliating than expected by chance. Temperament had been assessed at 3-4 months of age. Sex was the only individual characteristic predicting friendship stability: males maintained more friendships from age one to two than did females. Relationship characteristics predicting friendship stability included similarity between individuals in temperament, kinship, and sex. In addition, reciprocated friendships, rather than unidirectional friendships, were significantly more likely to persist over time. Our findings suggest that the factors influencing friendship maintenance in rhesus monkeys are similar to those impacting human friendship longevity.
File Format	HTM / HTML
ISSN	07357036
e-ISSN	19392087
DOI	10.1037/a0025607
Journal	Journal of Comparative Psychology
Issue Number	1
Volume Number	126
Language	English
Publisher	American Psychological Association
Publisher Date	2012-02-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Psychology Macaca Mulatta Psychology Social Behavior Animals Sex Factors Social Dominance Time Factors Research Support, N.i.h., Extramural Research Support, U.s. Gov't, Non-p.h.s.
Content Type	Text
Resource Type	Article
Subject	Psychology Ecology, Evolution, Behavior and Systematics

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