While people with autism and other intellectual and developmental disabilities receive extensive services for their behavioral health needs, many continue to struggle and lack a positive quality of life. The primary reason for referral for professional mental health care is most often the occurrence of aggression and other externalizing behaviors. Aggressive Behavior of People with Autism and other Intellectual and Developmental Disability explores the primary factors influencing the occurrence of aggression in this population are reviewed, and offers practical suggestions for improving outcomes. Topics covered include understanding effects of neurodevelopmental disorders, multiple factors frequently impacting risk for aggression, common medical and neurological influences, and the effects of trauma. This book will also introduce a new model for integrating multiple influences into a contextual functional behavior assessment.