Researchers suggest women who rate themselves as pretty display a war-like streak when fighting battles to get their own way. The findings appear in Proceedings of the National Academy of Sciences, reports BBC News. 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. "These findings were interesting but should be interpreted with caution as this was a small study on a very limited sample group so it is not possible to generalize" said consultant psychologist Ingrid Collins, of The London Medical Centre.