This sixth book in the Prevention Practice Kit provides an introduction to evidence-based prevention in psychology. Counselors, psychologists and mental health workers in schools, government agencies, community settings, and in private practice are increasingly expected to select evidence-based practices and programs, and to document the effectiveness of the care they provide. The book addresses the types of questions that may be most pertinent to counselors, psychologists, and other mental health workers who are engaged in prevention and interested in understanding evidence-based programs.