Contains several articles by experts in the fields of special education and psychology. Each article explores the issues, theories, and practices of assessing problem behavior and determining how to use this information. Together, the articles of this text present current advances in the use of functional assessment technology: taking the techniques and strategies of traditional functional analysis and using this information to construct clinical interventions. Three sections focus on the following topics: how functional assessment can be used to intervene effectively and change problem behavior, common procedures for using functional assessment in the preschool and school classroom, and new directions and trends in the field of functional assessment. A thorough and well-researched base of knowledge on problem behavior is provided, and the student learns the many ways in which this behavior may be diagnosed, intervened, and ideally changed.