When considering the emotional state of psychological abusers, psychologists have focused on aggression as a contributing factor. While it is typical for people to consider males to be the more aggressive of the two sexes, researchers have studied female aggression to help understand psychological abuse patterns in situations involving female abusers. According to Walsh and Shluman, "The higher rates of female initiated aggression psychological aggression may result, in part, from adolescents' attitudes about the unacceptability of male aggression and the relatively less negative attitudes toward female aggression". This concept that females are raised with fewer restrictions on aggressive behaviors (possibly due to the anxiety over aggression being focused on males) is a possible explanation for women who utilize aggression when being mentally abusive.