Health locus of control, values, and weight reduction behavior.

This study, in a natural setting, attempted to predict health-related behavior on the basis of the personality construct locus of control. Thirty-six participants in a weight reduction program completed the Multidimensional Health Locus of Control Scale (MHLC) and a value scale that included the values of "health" and "physical appearance." Subjects also were asked to determine their weight loss goal in pounds. Three months later their progress was assessed, and 22 of the subjects again completed the MHLC and value surveys. Consistent with the first hypothesis, those subjects who perceived their health status to be under the control of powerful others and valued health and/or physical appearance highly weighed in more frequently at the weight center than did the other subjects. Contrary to the second hypothesis, subjects did not become more "internal" as a result of successful weight loss. Subjects who valued physical appearance highly were found to have higher "external" control beliefs. Theoretical significance and practical applications of the findings are discussed.