According to a new study by SMU psychological scientist and lead researcher Katherine Valentine, women perceive men with wider faces as more dominant and more attractive for short-term relationships. Valentine and colleagues hypothesised that increased facial width-to-height ratio (fWHR), due to its link with testosterone, would make men seem more dominant and more desirable as romantic interests in the short term. However, because facial width is also linked with undesirable traits like aggression, women would not see these men as more desirable for long-term relationships. Researchers studied over 150 men and women, ages 18 to 32, who participated in one of several speed-dating events.