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Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role...
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Changes in Computer-Analyzed Facial Expressions with Age.

Hyunwoong Ko1,2,3, Kisun Kim2, Minju Bae1,2

  • 1Interdisciplinary Program in Cognitive Science, Seoul National University, Seoul 08826, Korea.

Sensors (Basel, Switzerland)
|July 24, 2021
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Summary
This summary is machine-generated.

Older adults show distinct facial expression patterns, using more facial muscles and displaying stronger negative emotions and neutral expressions compared to younger adults. This research offers insights into facial aging.

Keywords:
facial action unitfacial agingfacial expressionposed emotion

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Area of Science:

  • Psychology
  • Gerontology
  • Computer Vision

Background:

  • Facial expression changes with age are known.
  • Quantitative aspects of facial aging are not well understood.

Purpose of the Study:

  • Investigate age-related differences in facial expression intensity.
  • Compare facial muscle usage between older and younger adults.

Main Methods:

  • Laboratory experiments with posed facial expressions.
  • Six basic emotions and neutral stimuli used.
  • OpenFace software for facial expression analysis.

Main Results:

  • Older adults showed stronger expressions for negative emotions and neutral faces.
  • Older adults utilized more facial muscles across emotions than younger adults.

Conclusions:

  • Aging influences the intensity and muscle activation of facial expressions.
  • Findings provide empirical data for facial recognition and aging studies.