Mental health clinicians rely on a range of legal mandates and interpersonal strategies of encouragement and pressure to address nonadherence to treatment. This paper describes the development and testing of a scale to assess formal and informal strategies used by clinicians to encourage adherence to medication. The 16-item measure was administered to 271 clinicians and analyzed using Rasch measurement modeling. Subsequently, items were revised and readministered to a second sample of 44 clinicians in an urban mental health clinic. Rasch analysis of the items yielded a coherent and internally consistent unidimensional measure of strategies used to promote adherence that vary on a continuum of pressure or social control. Criterion-related validity was assessed by observing the association of the measure with clinician ratings of client adherence. The resulting measure may be employed in future studies to examine the ways in which clinician behavior relates to medication adherence and to consumer perceptions of treatment alliance, quality of care, and perceived coercion.