required to produce the outcomes” (Bandura, 1977, p. 193). “If the person perceives that the event is contingent upon his own behavior or his own relatively permanent ch a r a cteristics, we have termed this a belief in internal control” (Rotter, 1966, p. 1). Patients who have greater self-efficacy or internal health locus of control are thought to achieve greater adherence as they actively take part in health behavior and overcome perceived b a r r i e r s . Further, it is generally believed that people will be compliant with regard to healthy behavior if they believe that the anticipated barriers are outweighed by the benefits (J a n z et al., 20 02). Results from the current study are consistent