The document summarizes a study that examined the relationship between locus of control and weight reduction from a behavior modification program. The study involved 41 participants who took part in a 2-year weight reduction group program. The program consisted of 8 full days of sessions over 6 weeks that provided training on diet, behavior modification, and physical activity. Participants were measured at baseline and throughout the program. The results found that participants with a more internal locus of control experienced greater weight reduction, suggesting an internal orientation may be predictive of success in obesity therapy. Limitations included some participant dropout.