Kobayashi, Y., Matsushita, S., & Morikawa, K. (小林勇輝・松下戦具・森川和則)

Effects of lip color on perceived lightness of human facial skin

i-Perception, 8(4), 2017

doi: 10.1177/2041669517717500


Whereas geometric illusions in human faces have been reported by
several studies, illusions of color or lightness in faces have seldom
been explored. Here, we psychophysically investigated whether lip
color influences facial skin's perceived lightness. Results of
Experiment 1 demonstrated that redder lips lightened and darker lips
darkened the perceived complexion. These lightness or darkness
inducing effects differ from the classical illusion of lightness
contrast in nonface objects for two reasons. First, illusory effects
are more assimilative than contrastive. Second, the inducing area
(i.e., lips) is much smaller than the influenced area (facial skin).
Experiment 2 showed that the assimilative lightness induction was
caused by holistic processing of faces. This is the first study to
scientifically substantiate the claim of cosmetics manufacturers and
makeup artists that lip colors can alter perceived facial skin color.
Implications for face perception, lightness illusion, and perceptual
effects of cosmetics are discussed.

著者Contact先の email:
y-kobayashi[at] (小林勇輝)