<P> The facial feedback hypothesis states that facial movement can influence emotional experience . For example, an individual who is forced to smile during a social event will actually come to find the event more of an enjoyable experience . </P> <P> Charles Darwin was among the first to suggest that physiological changes caused by an emotion had a direct impact on, rather than being just the consequence of that emotion . He wrote: </P> <P> The free expression by outward signs of an emotion intensifies it . On the other hand, the repression, as far as this is possible, of all outward signs softens our emotions...Even the simulation of an emotion tends to arouse it in our minds . </P>

Who came up with the facial feedback hypothesis