Implicit preference for human trustworthy faces in macaque monkeys

• DOI: 10.1038/s41467-018-06987-4
• Publication Date: 2018-10-24T16:23:36Z
• Authors: Manuela Costa; Alice Gomez; Elodie Barat; Guillaume Lio; Jean-René Duhamel; Angela Sirigu
• Keywords: Trustworthiness

Abstract It has been shown that human judgements of trustworthiness are based on subtle processing specific facial features. However, it is not known if this ability a specifically function, or whether shared among primates. Here we report macaque monkeys ( Macaca Mulatta and Fascicularis) , like humans, display preferential attention to trustworthiness-associated cues in computer-generated faces. Monkeys looked significantly longer at faces categorized priori as trustworthy compared untrustworthy. In addition, spatial sequential analysis monkeys’ initial saccades revealed an upward shift with moving the eye region for while no change was observed untrustworthy ones. Finally, found significant correlations between width-to-height ratio– morphometric feature predicts trustworthiness’ judgments humans – looking time both species. These findings suggest presence common mechanisms primates first impression trustworthiness.