UFC Fighters Who Smile Before a Fight Lose More

  • UFC Fighters Who Smile Before a Fight Lose More
    Gil Greengross Ph.D. Humor Sapiens 
    Smile as a sign of submission and lack of aggression

    Smiling can teach us quite a bit about a person. A person who smiles tends to be in a good mood, easygoing and is fun to be around. People with a genuine smile (called the Duchenne smile) invite us to engage with them, start a conversation or even signal theirromantic interest.


    One of the hypotheses about the evolutionary origin of humor stems from studying smile and laughter in other animals, especially primates. Observations by primatologists reveal that many of our closest relatives use a facial expression that is similar to a human smile, usually referred to as the silent bared teeth display. This display is distinct from another display called the relaxed open mouth, which we equate with human laughter.


    The silent bared teeth display among primates usually appears in fearful situations as a sign of submission after a fight between two individuals. The losing individual smiles to the winner and accepts his superiority to end the conflict.


    Well, if this display is observed in chimpanzees, bonobos, orangutans and other apes, maybe it has a similar function among humans? A new study published in the journalEmotion wanted to test this by looking at whether smiles are signs of submission, and if individuals who do not smile are more likely to win fights. The researchers found a clever way to test this hypothesis by looking at pre-fight facial expressions of UFC fighters.


    The idea behind the study is that people who smile more or have more intense smiles, are less aggressive in nature and also tend to have lower testosterone levels, compared to those who smile less or have weaker smiles. Studies show that low status individuals smile more than higher status people, and in general, smiling is seen as a sign of appeasement. Based on these studies, the authors wanted to see if “smile intensity prior to a physical confrontation would unintentionally leak information about the reduced hostility and aggression of expressers, and thereby act as a sign of reduced physical dominance.” In other words, the hypothesis is that those who smile prior to a fight lack the aggression needed to win it, and the non-smiling fighter may conclude that his opponent is weak and submissive, which could motivate him even more and improve his chances of winning.


    To test their hypothesis, the researchers coded the smile intensity of 152 UFC fighters one day prior to their fight. The photographs were taken during the traditional face-off between the fighters. Four independent judges, blind to the study hypothesis, coded the smiles for intensity. The researchers also controlled for potential confounding variables, such as the gambling odds of the fight.


    The results showed that fighters who displayed a less intense smile won more fights. This was true for all fights, including the ones that were decided by a knockout. Interestingly, smile intensity predicted fight outcomes for the fights on the day after the photograph was taken but not for subsequent fights. This finding suggests that smile intensity does not necessarily reflect an individual personality trait, but rather is a situational cue that that has short-lived consequences. Think of it as the difference between having a humorous outlook that affects your life as a whole, compared to laughing in response to a specific joke that does not necessarily reflect your humor preferences.

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