Abstract # 90:

Scheduled for Saturday, September 17, 2011 07:00 PM-09:00 PM: Session 14 (Salon G (Sixth Floor)) Poster Presentation


M. Fisher-Phelps, J. M. GOTHBERG, S. P. Mendoza, W. A. Mason and K. L. Bales
University of California-Davis, 1880 Cowell Blvd, #122, Davis, CA 95618, USA

Temperament has been successfully measured in Old World monkeys such as rhesus macaques (Macaca mulatta). Here we perform a systematic study of a New World species, the coppery titi monkey, in order to validate temperament instruments. Using behavioral adjectives and a human intruder test, the temperaments of fifty coppery titi monkeys were assessed. Three independent researchers used seventeen adjectives to rate the temperament of each monkey. The adult monkeys were then tested for reactivity using a human intruder test where they were exposed to just a human or a human with a novel/fearful object. Factor analysis was used to analyze adjective ratings and produce factor scores. Results from the intruder test showed significant individual variation in time spent in the position closest to the intruder (p < 0.0001), as well as an effect of sex (p = 0.018) and significant interactions between sex, condition, and pairing status. Specifically, all animals spent less time near the intruder when a novel/fearful object was displayed; males spent more time close to the intruder than females, and individually housed males spent more time close to the intruder than paired males. These data were then compared to factor scores from adjective ratings and used to examine the inter-generational transmission of temperament from parent to offspring. This research was supported by NIH RR00169, HD053555, and the Good Nature Institute.