Posavac and Carey provide a comprehensive, but accessible, introduction to the field of program evaluation featuring methods needed to evaluate programs offered in public and private mental health, educational, health care, criminal justice, and human resource organizations. By adopting a flexible philosophy of evaluation, the authors demonstrate how program evaluation can be applied to answer a wide variety of questions in many different settings. The sixth edition includes case studies of completed program evaluations and sketches of the careers of program evaluators to help readers develop an appreciation of the applicability of evaluation methods. The authors stress the importance of working with representatives of all groups affected by a program, whether they be program staff or managers, recipients. or people providing financial or moral support. The Improvement-Focused Model of Evaluation can be used to include many people in the evaluation process. The teat shows that the application of program evaluation serves to contribute to making society more effective, just, and healthy.