Assessed fourth-graders' peer clique characteristics as a function of socioeconomic status, gender, and aggressiveness. Found that rejected youth were less central group members than average-status peers; aggressive preadolescents were no less involved than nonaggressive peers; rejected preadolescents belonged to smaller cliques and cliques comprised of low-status peers; and aggression was associated with being central members of deviant peer cliques. (Author/KB)