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Common marmoset (Callithrix jacchus) personality

Citation
Koski SE, Buchanan-Smith HM, Ash H, Burkart JM, Bugnyar T & Weiss A (2017) Common marmoset (Callithrix jacchus) personality, Journal of Comparative Psychology, 131 (4), pp. 326-336.

Abstract
Increasing evidence suggests that personality structure differs between species, but the evolutionary reasons for this variation are not fully understood. We built on earlier research on New World monkeys to further elucidate the evolution of personality structure in primates. We therefore examined personality in 100 family-reared adult common marmosets (Callithrix jacchus) from three colonies on a 60-item questionnaire. Principal components analyses revealed five domains that were largely similar to those found in a previous study on captive, ex-pet, or formerly laboratory-housed marmosets that were housed in a sanctuary. The interrater reliabilities of domain scores were consistent with the interrater reliabilities of domain scores found in other species, including humans. Four domains---conscientiousness, agreeableness, inquisitiveness, and assertiveness---resembled personality domains identified in other nonhuman primates. The remaining domain, patience, was specific to common marmosets. We used linear models to test for sex and age differences in the personality domains. Males were lower than females in patience, and this difference was smaller in older marmosets. Older marmosets were lower in inquisitiveness. Finally, older males and younger females had higher scores in agreeableness than younger males and older females. These findings suggest that cooperative breeding may have promoted the evolution of social cognition and influenced the structure of marmoset prosocial personality characteristics.  

Keywords
marmoset; personality; primates; cooperative breeding

StatusPublished
AuthorsKoski Sonja E, Buchanan-Smith Hannah M, Ash Hayley, Burkart Judith M, Bugnyar Thomas, Weiss Alexander
Publication date11/2017
Publication date online12/10/2017
Date accepted by journal17/07/2017
PublisherAmerican Psychological Association
ISSN 0735-7036
LanguageEnglish

Journal
Journal of Comparative Psychology: Volume 131, Issue 4

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