"How and when do chimpanzee babies acquire such abilities?" Tomonaga asked. When a black-and-white image of a banana was shown, the chimps took significantly longer to spot the fruit, while no such problem was seen with black-and-white versions of faces.įuture research could explore how well other primates detect faces and at what age chimps learn to quickly detect faces. However, further examination showed that the quick ID of the fruit had to do with its distinctive yellow color. Both species may use facial information for their social lives in the same manner."Ĭhimpanzees also detected a photo of a banana as efficiently as that of a face.
These results are quite suggestive when considering the evolution of social intelligence. "This implies that the face plays a very important social role in both species. The display of their developmental stages through. "Both humans and chimpanzees have developed a specialized ability for face processing," Tomonaga said. Our results showed that chimpanzees use unique infantile facial coloration as a salient cue when discriminating between adult and infant faces. Faces seen from the front were more easily detected than faces seen from the side, suggesting that eye-to-eye contact is important for chimps, just as it is in humans. The researchers suggest this gap may result from long-lasting social experiences between chimps and humans. In subsequent experiments, the scientists also found that the chimpanzees efficiently detected the faces of human adults and babies, but were unable to identify monkey faces. (Image credit: Everrett Collection, Shutterstock) A vintage photograph of a man playing chess with a chimpanzee.
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