Scientific Reports 5, 11437
チンパンジーによる顔の効率的な探索

Efficient search for a face by chimpanzees (Pan troglodytes)

Masaki Tomonaga, Tomoko Imura

Abstract

The face is quite an important stimulus category for human and nonhuman primates in their social lives. Recent advances in comparative-cognitive research clearly indicate that chimpanzees and humans process faces in a special manner; that is, using holistic or configural processing. Both species exhibit the face-inversion effect in which the inverted presentation of a face deteriorates their perception and recognition. Furthermore, recent studies have shown that humans detect human faces among non-facial objects rapidly. We report that chimpanzees detected chimpanzee faces among non-facial objects quite efficiently. This efficient search was not limited to own-species faces. They also found human adult and baby faces-but not monkey faces-efficiently. Additional testing showed that a front-view face was more readily detected than a profile, suggesting the important role of eye-to-eye contact. Chimpanzees also detected a photograph of a banana as efficiently as a face, but a further examination clearly indicated that the banana was detected mainly due to a low-level feature (i.e., color). Efficient face detection was hampered by an inverted presentation, suggesting that configural processing of faces is a critical element of efficient face detection in both species. This conclusion was supported by a simple simulation experiment using the saliency model.

Keywords

Neuroscience, Psychology

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Tomonaga M, Imura T (2015) Efficient search for a face by chimpanzees (Pan troglodytes) Scientific Reports 5, 11437 , doi: 10.1038/srep11437
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This article was featured on natureasia.com as one of their "must-read" articles. 当論文が、Scientific Reports誌注目の論文としてネイチャー・アジアwebサイトに掲載されました。https://www.natureasia.com/ja-jp/srep/abstracts/67820