Evidence for appraisal theories of emotion. A Smile Affects Mood. Also, not everyone has the same number of facial muscles; some have more, enabling a wider range of expression, while some people actually have 40 percent fewer [source: The chart above is from WikipediaIt is difficult to determine exactly how many muscles are involved in smiling or frowning as there is a wide range of facial expressions that might be considered a frown or a smile. Retrieved 26 August Journal of Personality and Social Psychology.
Buck R Nonverbal behavior and the theory of emotion:
How many muscles does it take to smile?
Across the psychological and neuroscientific literature, smiles have been conceptualized and named in different ways. Nevertheless, the hypothesis that facial mimicry mediates the effect of smile characteristics on rated authenticity remains the most parsimonious one based on the fact that 1 facial mimicry is a costly behavior for the organism, 2 participants spontaneously mimicked the perceived smiles, and 3 this mimicry predicted ratings of authenticity. Mimicry and Beliefs in Judgments of Smiles. Questions Tags Users Badges Unanswered. Humor perception with and without expressive suppression. Zygomaticus minor 2 muscles.