The University of California interviewed 156 female students to gauge their temperament and how they handled conflict.
The findings appear in Proceedings of the National Academy of Sciences.
In the study, the women who believed they were good looking were more likely to respond angrily in disputes than those who rated themselves as less attractive.
Attractive women also had higher expectations of what they deserved.
In men, they found a similar link but with physical strength rather than attractiveness per se.
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