During middle childhood, children's self-concepts become more complex as they develop personal and academic self-evaluations through social comparison. Self-esteem increases overall but becomes more nuanced, with both positive and negative self-views in different areas. Racial and ethnic identity also influence self-esteem development. Friendships transition through stages focused on behavior, trust, and personal sharing. Popularity relates to social competence and problem-solving skills. Gender and racial dynamics affect friendship formation. Family relationships remain important as children seek independence through coregulation with parents. Divorce, single parenting, and blended families present challenges but outcomes depend on supportive relationships and environments.