To overcome addiction, an addict first must want to change. How can drug abuse counselors enhance this motivation? Contingency management interventions are highly effective, and this timely book describes their use in treating individuals addicted to cocaine, heroin, and other illicit drugs. Contingency management provides incentive for change, using positive reinforcement for drug abstinence and punishment for returning to drug use, with the emphasis on positive reinforcement. This book brings together important new literature on the use of contingency management techniques with a wide range of individuals, including pregnant women, homeless people, and schizophrenic drug abusers.