Aggression written in the shape of a man's face


By Gursharan Randhawa No matter how hard men try, they may not be able to hide their aggression. A study in male ice-hockey players suggests that to gauge a man’s aggression levels, you just have to look at the proportions of his face. Cheryl McCormick and Justin Carre from Brock University in Ontario, Canada, found that the larger the width-to-height ratio of a player’s face, the more aggressive they were. They measured aggression by the number of penalty points each player accrued for potentially harmful behaviour, such as elbowing and fighting. In general, men’s faces tend to have a larger width-to-height ratio than women’s. This physical characteristic has been linked to higher levels of testosterone, which in turn is linked to aggressive behaviour. Most people would not want to pick a fight with a big, brawny man, but because facial ratio is not linked to body size, it may have been favoured by evolution to warn others of an aggressive personality they would not want to tangle with. Although the team first found the result in a study of students playing computer games, McCormick says they were “astounded to see that the measure could predict aggressive behaviour in a ‘real world’ setting”. Previous studies on facial metrics have suggested that women can tell whether a man wants children just by looking at their photograph. Now McCormick’s study raises the question of whether people can spot these subtle facial differences and use it to guide everyday behaviour. “If someone was given the choice of one of two opponents to compete against who differed on the basis of the facial metric, would the facial metric predict the less aggressive opponent?” asks McCormick. She believes that people’s faces may be influencing who we chose to socialise with on a daily basis. Journal reference: Proceedings of the Royal Society B (DOI:
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