The document discusses three studies on the influence of family on gender identity and roles. The first study examined toddlers' knowledge of gender stereotypes related to household activities. The second was a long-term study of adolescents' traditional attitudes related to birth order and parent interactions. The third focused on gender role conflicts for adult males transitioning from adolescence to adulthood. The author conducted a survey of two families, a large family of six and a small family of four, and found that siblings and parents can influence gender identity, but factors like family size, gender mix, values, and traditions also affect the level of influence.