This study examined punishment of excluders and compensation of victims after observing an instance of social exclusion at various phases of adolescent development. Participants (n = 183; age 9 to 22 years) were first included in a virtual ball-tossing game, Cyberball, and then "observed" the exclusion of a peer. Subsequently, they…

College students who took the Defining Issues Test (DIT) were instructed to simulate the responses of 11-, 15-, and 19-year-old adolescents; other college students selected moral issues which they believed should be presented to adolescents in those age groups who were faced with the moral dilemmas in the DIT. (Author/DB)

Seventy-five children at ages 10, 13, and 16 were administered Selman's role-taking interview, a measure of social desirability, and a multidomain measure of self-doubt. Consistent with the social-cognitive model, self-doubt decreased and role taking ability increased with age during early adolescence. (Author/JAZ)

Discusses the concept of egocentrism and its relation to cognitive development. Describes the major stages of egocentrism: sensori-motor, preoperational, concrete operational, and adolescent egocentrism. Focuses on research support for the theory of adolescent egocentrism. Discusses educational implications. (RC)