in a recent mimicking study at the university of clermont-ferrand in france, subjects were asked to determine whether a smile was real or fake while holding a pencil in their mouth to repress smiling muscles. without the pencil, subjects were excellent judges, but with the pencil in their mouth, when they could not mimic the smile they saw, their judgment was impaired.in addition to theorizing on evolution in the origin of species, charles darwin also wrote the facial feedback response theory. his theory states that the act of smiling itself actually makes us feel better -- rather than smiling being merely a result of feeling good. in his study, darwin actually cited a french neurologist, guillaume duchenne, who used electric jolts to facial muscles to induce and stimulate smiles. please, dont try this at home.
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