Abstract # 70:

Scheduled for Thursday, June 18, 2015 06:00 PM-08:00 PM: (Cascade AJBCD) Poster Presentation


BEHAVIORAL INHIBITION CHARACTERIZED IN INFANCY PREDICTS SOCIABILITY IN ADULT RHESUS MONKEYS (MACACA MULATTA)

K. Chun1,2, E. Bliss-Moreau1,2, S. A. Aston3, R. Barrington3, J. Shackett3, J. D. Higley3 and J. P. Capitanio1,2
1University of California, Davis , One Shields Ave, Davis, CA 95616, USA, 2California National Primate Research Center, 3Department of Psychology, Brigham Young University, Provo, UT
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     In children, behavioral inhibition (BI) is characterized by a disposition to withdraw in the presence of strangers and novel situations. Research with humans has shown that, later in life, BI can result in a decrease in social behavior compared to control animals. To understand the continuity of BI into adulthood in rhesus monkeys, BI was characterized during infancy as low emotionality and activity, then n=59 adult rhesus monkeys (mean age=6.98, 38-females) were observed in naturalistic outdoor field corrals at the California National Primate Research Center by collecting eight 10-minute focal observations on time-ruled, 15-sec interval check sheets using instantaneous sampling method. A basic ethogram was used consisting of two behaviors: social (which included proximity, grooming, and contact) and non-social. At the end of observations, a Generalized Affectivity and Sociability Scale was used to index the extent to which subjects engage socially and non-socially (social-scale) in positive and negative (valence-scale) behaviors. In the outdoor corrals, adults classified as behaviorally-inhibited during infancy spent more time alone as adults compared to non-inhibited animals (F(1,58)=8.179, p=.006, r²=.125) and were rated lower on the social scale (F(1,58)=6.33, p=.015, r²=.010), while groups did not differ on valence of social behaviors (F(1,58)=.105, p=.747). Overall our data show that, as in humans, individuals characterized as behaviorally-inhibited as infants showed lower levels of social interaction, but not differences in valence of behaviors in adulthood.