Answer:
One of the first studies to support the facial feedback hypothesis was done in 1988. Instead of telling subjects the study was about emotion, researchers asked subjects to hold a pencil in one of three ways. Some people held the pencil in their teeth widthwise, which essentially forced them to smile, some people held the pencil in their mouth lengthwise, which means they were kind of frowning, and some people held the pencil in their hands. Then, all the subjects looked at some Far Side cartoons and recorded how funny they thought the cartoons were. The people who had been forced to smile (physiologically) rated the cartoons as funnier than the people who held the pencil in their hands. As you may have guessed, the people who had been forced to frown found the cartoons the least funny. Some more recent studies of Botox patients also suggest that emotions might be induced by our facial expressions. For example, a small-scale study done at the University of Cardiff in Wales found an increased level of happiness in cosmetic treatment patients who had received Botox injections and thus could not physiologically frown! Other behaviors might also influence our emotions. One study found that walking in a jaunty, happy way could make a person feel happier. A happy walk means walking upright, swinging your arms, bouncing a little through your legs, and not swaying left-to-right.
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