Experienced Control and Participation in Treatment of Obesity
Results of three studies are presented which explore the relation of experienced control to participation in treatment for obesity. Subjects in all studies were adult females participating in an outpatient, behaviorally-oriented obesity program. Experienced control was measured using the Experienced Control Scale (Tiffany, 1967). Study 1 was a naturally occurring experiment which compared two groups ( ns = 7 and 8) that differed in extent of self-directed efforts to begin treatment. Study 2 compared 32 persons who completed the program and 18 persons who did not complete it. High levels of experienced control over internal forces were associated with increased efforts to initiate treatment and with completion of treatment. Study 3 assessed the temporal stability of the Experienced Control Scale with obese females tested at the beginning and end of the 12-wk. treatment program. Test-retest reliability coefficients were .64 ( p < .01) for the internal control subscale and .29 ( P < .10) for the external control subscale.