Infant monkeys' visual responses to drawings of normal and distorted faces
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TL;DR
The present study explored the facial preferences in infant pigtailed macaques with paired drawings of adult conspecific monkey faces, and subjects looked at the normal face more than expected by chance, suggesting a preference, whereas the distorted faces were observed randomly.
Abstract
Face-like patterns attract attention from both human and nonhuman primates. The present study explored the facial preferences in infant pigtailed macaques (Macaca nemestrina). Twenty-five subjects looked at 20 paired drawings of adult conspecific monkey faces, and their looking time was recorded. The facial features in the drawings were arranged in positions ranging from a normal to a scrambled face. The subjects looked at the normal face more than expected by chance (P < .02), suggesting a preference, whereas the distorted faces were observed randomly. The normal face may have been preferred because the eyes were in a normal position within the facial outline.
