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Changes in Computer-Analyzed Facial Expressions with Age

Interdisciplinary Program in Cognitive Science, Seoul National University, Seoul 08826, Korea
Department of Psychiatry, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul 03080, Korea
Dental Research Institute, School of Dentistry, Seoul National University, Seoul 08826, Korea
Behavioral Neuroscience Program, School of Medicine, Boston University, Boston, MA 02101, USA
Division of Teacher Education, College of Liberal Arts and Interdisciplinary Studies, Kyonggi University, Suwon 16200, Korea
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Wataru Sato
Sensors 2021, 21(14), 4858;
Received: 17 April 2021 / Revised: 13 July 2021 / Accepted: 15 July 2021 / Published: 16 July 2021
(This article belongs to the Special Issue Emotion Intelligence Based on Smart Sensing)
Facial expressions are well known to change with age, but the quantitative properties of facial aging remain unclear. In the present study, we investigated the differences in the intensity of facial expressions between older (n = 56) and younger adults (n = 113). In laboratory experiments, the posed facial expressions of the participants were obtained based on six basic emotions and neutral facial expression stimuli, and the intensities of their faces were analyzed using a computer vision tool, OpenFace software. Our results showed that the older adults expressed strong expressions for some negative emotions and neutral faces. Furthermore, when making facial expressions, older adults used more face muscles than younger adults across the emotions. These results may help to understand the characteristics of facial expressions in aging and can provide empirical evidence for other fields regarding facial recognition. View Full-Text
Keywords: facial action unit; facial aging; facial expression; posed emotion facial action unit; facial aging; facial expression; posed emotion
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MDPI and ACS Style

Ko, H.; Kim, K.; Bae, M.; Seo, M.-G.; Nam, G.; Park, S.; Park, S.; Ihm, J.; Lee, J.-Y. Changes in Computer-Analyzed Facial Expressions with Age. Sensors 2021, 21, 4858.

AMA Style

Ko H, Kim K, Bae M, Seo M-G, Nam G, Park S, Park S, Ihm J, Lee J-Y. Changes in Computer-Analyzed Facial Expressions with Age. Sensors. 2021; 21(14):4858.

Chicago/Turabian Style

Ko, Hyunwoong, Kisun Kim, Minju Bae, Myo-Geong Seo, Gieun Nam, Seho Park, Soowon Park, Jungjoon Ihm, and Jun-Young Lee. 2021. "Changes in Computer-Analyzed Facial Expressions with Age" Sensors 21, no. 14: 4858.

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