According to Kim Wallen, expectations will nonetheless play a role in how girls perform academically. For example, if females skilled in math are told a test is "gender neutral" they achieve high scores, but if they are told males outperformed females in the past, the females will do much worse. "What’s strange is," Wallen observed, "according to the research, all one apparently has to do is tell a woman who has a lifetime of socialization of being poor in math that a math test is gender neutral, and all effects of that socialization go away."[47] Author Judith Harris has said that aside from their genetic contribution, the nurturing provided by parents likely has less long-term influence over their offspring than other environmental aspects such as the children's peer group.[48]