Peer influence has a greater impact on children's development than parenting styles according to the psychologist Judith Rich Harris. Children who grow up in disciplined or chaotic homes are equally likely to develop in similar ways if they mix with unruly classmates early on. During adolescence, peers account for 29% of a high schooler's time and influence their self-esteem and behavior more than family. Children and teens learn social norms from their peers and conform to their groups' styles and activities.