The theoretical perspective of Sullivan proposes that during preadolescence, a "chum" relationship increases a child's sense of self-worth. Subjects were 60 male sixth graders, with an equal number in the chumship and non-chumship groups. Self-concept was measured with the Piers-Harris Children's Self-Concept Scale. The results show that children involved in a chum relationship possessed significantly higher self-concepts than those without a chum. This finding is explained in terms of Sullivan's notion that a chum relationship provides the opportunity for the preadolescent to realize that he shares common thoughts and feelings with his friend, therein validating his own sense of self-worth. (Author)