This book provides a comprehensive outline of the major parent training programs for parents of children with intellectual or developmental disabilities (IDD), including Autism Spectrum Disorder. Parents or primary caregivers spend the most time with a child, and training them in behaviour management and intervention strategies is critical to improving a child's behaviour, to helping them to learn new skills, and to reduce parental stress. Authored by eminent specialists in the field and written for researchers and clinicians supporting or treating families, each chapter focuses on one of the key evidence-based parent training programs - from Incredible Years® and Positive Family Intervention through to Pivotal Response Treatment and Acceptance and Commitment Therapy. Each chapter provides a breakdown that features an introduction to the model, evidence for the model, a full description of the model, a discussion of implementation and dissemination efforts, and concluding comments. Grounded in research, this definitive overview provides the evidence and guidance required for anyone considering investing in or running a parenting program.