Facial expressions of happiness, fear, anger, and suffering can be reduced to the shapes of eyes and mouths. As suggested in [1, 2], the perceived emotions in facial expressions involve processing by the
THINGS TO TRY
 R. Adolphs, D. Tranel, and A. Damasio, "The Human Amygdala in Social Judgment,"
, 1998 pp. 470–474.
 P. Vuilleumier, "Staring Fear in the Face"
, 2005 pp. 22–23.
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Published: June 27, 2007
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