Development of the Mental Health Locus of Control and Mental Health Locus of Origin Scales

The Mental Health Locus of Control (MHLC) Scale is an area-specific measure of locus of control expectancies designed to predict mental health related behaviors, particularly those occurring in treatment situations. The discriminant validity of the MHLC, in contrast with Rotter's 1-E measure of generalized expectancies, was demonstrated with two mental health related variables: beliefs concerning etiology of psychopathology, and information about abnormal psychology. Beliefs about etiology were measured by the Mental Health Locus of Origin (MHLO) Scale. The primary hypothesis, that individuals with 'endogenous' beliefs about etiology tend to have 'external' expectations for the client's role in treatment, was supported by a statistically significant (p < .001) correlation between the MHLC and MHLO Scales.