Point: A strength of Kohlberg's stage theory is that evidence suggests gender stereotyping emerges around the age of 6, as he predicted.
Evidence: For example, Damon (1977) told children a story about George, a boy who liked to play with dolls.
Explain: Four-year-olds thought it was fine for George to play with dolls, while six-year-olds believed it was wrong, indicating they had developed rules about what boys and girls ought to do.
Link: Therefore, this suggests that children who achieve gender constancy form rigid stereotypes about gender-appropriate behaviour, supporting Kohlberg's theory.