Peer relations contribute substantially to both social and cognitive development. The essentials of friendship are reciprocity and commitment between individuals who see themselves more or less as equals. Affiliation and common interests, the main themes in friendship relations, are first understood in early childhood. Friends serve as emotional…

Proposes a new theory of self, based on the principles defined by Lawrence Kohlberg in his theory of moral development. The model sets forth self complexity (schemata) and biography (themata) as dimensions of self. Describes normal and atypical development arising from interaction of these components and assesses implications for practice. (KO)

This study compared self-regulation and external regulation procedures in the treatment of children's disruptive classroom behavior. Following the collection of baseline data, three of the four most disruptive children in each of 10 first and second grade classrooms were reinforced by the experimenter for achieving low rates of disruptive…