They socialise themselves by actively seeking out same-sex models and information about how to act like a girl or a boy and only then do they show sex-typed behaviour
Bussey and Bandura (1992) found that children as young as four reported 'feeling good' about playing with gender appropriate toys and the opposite about playing with toys for the opposite gender
This is a limitation because this research suggests that gender-role behaviour does not depend on gender consistency as Kohlberg proposed or that, as previously mentioned, Kohlberg's approximate ages were wrong
Although Kohlberg acknowledges that age related cognitive development drives a child's understanding of gender, he ignores other biological factors in gender identity
This is a limitation because such evidence suggests that Kohlberg focuses too much on the child's cognitions and his theory is therefore over-simplistic