A widely adopted practitioner resource and course text, this book shows how to apply knowledge about behavior change in general- and the stages — and the stages-of-change model in particular — to make substance abuse treatment more effective. The authors describe ways to tailor interventions for clients with varying levels of motivation or readiness to change. They draw on cutting-edge theory and research to explain what works (and what doesn’t work) at different stages of change. Rich clinical examples illustrate the “whats,” “whys,”, and “how-tos” of using the stages-of-change model to inform treatment planning and intervention for individuals, groups, couples, and families.