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Research from Gettysburg College in collaboration with CE.R.I.E.S., a department of Chanel Research and Technology, has unveiled a new sign of aging, the contrast between facial features.
Richard Russell, PhD, a professor of psychology at Gettysburg, noted that humans unconsciously determine a person's age by measuring the difference between facial features and surrounding skin, and this difference decreases with age. Russell's findings are published in PLoS One in the article "Aspects of Facial Contrast Decrease with Age and Are Cues for Age Perception."
The discovery of this cue to facial age perception may partly explain why cosmetics are worn the way they are, and it lends more evidence to the idea that makeup use reflects our biological as well as our cultural heritage, according to Russell.
In one study, Russell and his team measured images of 289 faces ages 20-70 years old, and found that through the aging process, the color of the lips, eyes and eyebrows change, while the skin becomes darker. This results in less contrast between the features and the surrounding skin – leaving older faces to have less contrast than younger faces.
The difference in redness between the lips and the surrounding skin decreases, as does the luminosity difference between the eyebrow and the forehead, as the face ages. Although not consciously aware of this sign of aging, the mind uses it as a cue for perceiving a person's age.
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