The second edition of the bestselling "The ABCs of Evaluation" offers a thoroughly revised and updated version of that classic book. Written for any program type or setting, "The ABCs of Evaluation" shows how to select participants for the evaluation and how to deal with multiple goals and objectives including those of the organization, the staff, and the client. The authors describe different evaluation models, illustrate the circumstances under which each model can be used, and offer tips on identifying data sources and collecting the data itself. This new edition is filled with illustrative new cases and scenarios from various evaluation realms in social sciences, education, and human services. The book also contains information on how to negotiate the evaluation contract. Throughout the book, there are charts, graphs, models, and lists to help organize, extend, and facilitate the understanding of each evaluation concept.