Motivational Therapy was brought to public awareness by William Miller in a 1983 article published in "Behavioural Psychotherapy". In 1991, Miller and Stephen Rollnick expanded on the fundamental approaches and concepts, while making more detailed descriptions of procedures in the clinical setting. He later defined it as a directive, client-centered counseling style for eliciting behavior change by helping clients to explore and resolve ambivalence. Compared with non-directive counseling, Motivational Therapy is more focused and goal-directed. The examination and resolution of ambivalence is its central purpose, and the counselor is intentionally directive in pursuing this goal.