Perception of Human Age from Faces: Symmetric Versus Asymmetric Movement

Dynamic movements of a face affect human perception of a person’s identification, emotional expression, speech, and so on. Findings of studies related to age perception, however, have mainly been obtained from static features of texture such as wrinkles and spots on the skin. Our goal is t...

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Main Authors:	Miyuki G. Kamachi, Tsukasa Chiba, Motonori Kurosumi, Koji Mizukoshi
Format:	Article
Language:	English
Published:	MDPI AG 2019-05-01
Series:	Symmetry
Subjects:	facial age perception symmetry or asymmetry of motion lateralization dynamic facial expression
Online Access:	https://www.mdpi.com/2073-8994/11/5/650

id	doaj-9c71ed37d6e2480b8880238b8ce8a27e
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spelling	doaj-9c71ed37d6e2480b8880238b8ce8a27e2020-11-25T01:17:56ZengMDPI AGSymmetry2073-89942019-05-0111565010.3390/sym11050650sym11050650Perception of Human Age from Faces: Symmetric Versus Asymmetric MovementMiyuki G. Kamachi0Tsukasa Chiba1Motonori Kurosumi2Koji Mizukoshi3Faculty of Informatics, Kogakuin University, Tokyo 1638677, JapanGraduate School of Engineering, Kogakuin University, Tokyo 1638677, JapanPOLA Chemical Industries Inc., Yokohama 2440812, JapanPOLA Chemical Industries Inc., Yokohama 2440812, JapanDynamic movements of a face affect human perception of a person’s identification, emotional expression, speech, and so on. Findings of studies related to age perception, however, have mainly been obtained from static features of texture such as wrinkles and spots on the skin. Our goal is to investigate the perception of human age related to dynamic information. Systematically manipulated bilateral symmetric and asymmetric facial movements were utilized as stimuli in the age perception experiment. All images were low-pass filtered so that the judgment would not depend on detailed texture information. In the experiment, viewers judged the age level (the first half (indicating 20−24 and 60−64) or the latter half (indicating 25−29 and 65−69) of two age groups: 20’s and 60’s. Results revealed that faces with symmetric dynamic movements of expression (from a neutral face to one pronouncing “<i>i</i>”) were not only judged at the level of chance, but were also perceived to be statistically significantly younger than faces with asymmetric dynamic movements. It was also found that types of asymmetry were also effective in age perception, which might be a reflection of laterization of facial processing in a human brain.https://www.mdpi.com/2073-8994/11/5/650facial age perceptionsymmetry or asymmetry of motionlateralizationdynamic facial expression
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Miyuki G. Kamachi Tsukasa Chiba Motonori Kurosumi Koji Mizukoshi
spellingShingle	Miyuki G. Kamachi Tsukasa Chiba Motonori Kurosumi Koji Mizukoshi Perception of Human Age from Faces: Symmetric Versus Asymmetric Movement Symmetry facial age perception symmetry or asymmetry of motion lateralization dynamic facial expression
author_facet	Miyuki G. Kamachi Tsukasa Chiba Motonori Kurosumi Koji Mizukoshi
author_sort	Miyuki G. Kamachi
title	Perception of Human Age from Faces: Symmetric Versus Asymmetric Movement
title_short	Perception of Human Age from Faces: Symmetric Versus Asymmetric Movement
title_full	Perception of Human Age from Faces: Symmetric Versus Asymmetric Movement
title_fullStr	Perception of Human Age from Faces: Symmetric Versus Asymmetric Movement
title_full_unstemmed	Perception of Human Age from Faces: Symmetric Versus Asymmetric Movement
title_sort	perception of human age from faces: symmetric versus asymmetric movement
publisher	MDPI AG
series	Symmetry
issn	2073-8994
publishDate	2019-05-01
description	Dynamic movements of a face affect human perception of a person’s identification, emotional expression, speech, and so on. Findings of studies related to age perception, however, have mainly been obtained from static features of texture such as wrinkles and spots on the skin. Our goal is to investigate the perception of human age related to dynamic information. Systematically manipulated bilateral symmetric and asymmetric facial movements were utilized as stimuli in the age perception experiment. All images were low-pass filtered so that the judgment would not depend on detailed texture information. In the experiment, viewers judged the age level (the first half (indicating 20−24 and 60−64) or the latter half (indicating 25−29 and 65−69) of two age groups: 20’s and 60’s. Results revealed that faces with symmetric dynamic movements of expression (from a neutral face to one pronouncing “<i>i</i>”) were not only judged at the level of chance, but were also perceived to be statistically significantly younger than faces with asymmetric dynamic movements. It was also found that types of asymmetry were also effective in age perception, which might be a reflection of laterization of facial processing in a human brain.
topic	facial age perception symmetry or asymmetry of motion lateralization dynamic facial expression
url	https://www.mdpi.com/2073-8994/11/5/650
work_keys_str_mv	AT miyukigkamachi perceptionofhumanagefromfacessymmetricversusasymmetricmovement AT tsukasachiba perceptionofhumanagefromfacessymmetricversusasymmetricmovement AT motonorikurosumi perceptionofhumanagefromfacessymmetricversusasymmetricmovement AT kojimizukoshi perceptionofhumanagefromfacessymmetricversusasymmetricmovement
_version_	1725144789160034304

Perception of Human Age from Faces: Symmetric Versus Asymmetric Movement

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