Professionals who work in mental health and educational settings are frequently faced with clients (children, adolescents, adults) who engage in serious problem behaviors. Such behaviors often impact the client"s welfare and ability to live, work, and be educated in mainstream environments. Children and adolescents who manifest these behaviors are particularly vulnerable to these disruptions, which can have a far-reaching impact on their development and future prospects. This practical book, written both for clinician/educators and high-level students, creates a function-based behavioral diagnostic classification system, the first of its kind, as well as treatment protocols that fit such a diagnostic system. Heavily "practitioner-oriented," the book will address the full range of behaviors--ranging from aggression, self-injury, stereotypic behavior (repetitive body movements), tantrums, and non-compliance--with real life and hypothetical cases to help clinicians think through...