?This book addresses the contribution of behavioral psychology, applied behavior analysis, behavioral medicine, and cognitive-behavioral treatment to health issues among people who have intellectual and developmental disabilities (IDD). It provides a comprehensive synopsis and review of evidence-based procedures that have been extensively researched and translated into effective practices by multidisciplinary healthcare providers. From the perspective of tertiary prevention, the book covers methods for treating health problems such as food refusal, sleep disorders, body-focused (tissue-damaging) repetitive behaviors, and rumination. It examines how to reduce risk factors that impose health concerns, including noncompliance with medical routines, maintaining personal hygiene, and assessing unhealthy lifestyles. It addresses several key areas of primary prevention, such as increasing physical activity and promoting safe environments for curtailing harmful and potentially fatal injuries. In addition to highlighting these symptom-directed, risk reduction, and primary prevention interventions, the book details consultation and training models for working successfully with physicians, nurses, parents, direct-care practitioners, and ancillary healthcare professionals. A key feature of the book is its best practices recommendations as well as methodologies for advancing clinical and applied research. This volume is a must-have resource for researchers, clinicians, and graduate students in clinical psychology, behavioral therapy, social work, public health, and related psychology and behavioral health fields.?