Psy311- lecture 12 &13 february 24, 2014. Sex role development (subtopic of knowledge of others because you can relate to other males or females and develop your sex role) Infancy: distinguish faces by sex, for example, women have long hair and no facial hair and males have short hair and might have beard or moustache. 2 years: label by sex able to identify as an important category used to distinguish between two people. Even in egalitarian families where boys and girls are raised the same, you still see the sex stereotypes toy preference. They might think teachers, police-man, fire fighter, truck driver, nurse, so they think about tangible occupations. So they think fire fighters are men and teachers and nurses are women, etc. 5 years: association of personality traits with sex. For example, thinking that men are strong, and females are gentle. Sex: biological dimension of being male or female. We are going to pretend that this is dichotomous.