During the past 80 years, similar descriptions of a hyperactive behavior pattern in children have appeared in medical, educational, and psychological literature. Hyperactivity has been conceptualized as a character disorder, an organic disorder, and, most recently, as a behavior disorder. In this study, hyperactivity was explained in interactional terms, using Rotter's social learning theory of personality. Little consideration has been given in research to the influence of an abnormally high activity level upon personality development during childhood. The purpose of this study was to investigate the general influence of negative interactions associated with hyperactivity upon the organization of four personality constructs: locus of control, self-esteem, trait anxiety, and state anxiety.