Autism spectrum disorder, or ASD, is the umbrella term used to describe a family of related conditions. Within this group, there are many diagnostic terms used such as autism, pervasive developmental disorder (PDD), and Asperger syndrome. This fully-updated second edition defines the commonalities and unique differences of children with these disorders, and looks at the evolving concept of the diagnosis. Written specifically for parents, it sets out what it means for a child to be diagnosed with ASD, PDD, autism, or Asperger syndrome, and offers parents direction on where to go from there. The authors describe the characteristics of each condition, how a diagnosis is made, and what it means for an individual child. Associated conditions are discussed and various treatments, therapies, and educational approaches are reviewed. The book also includes new information on medication usage as well as frequently asked questions by parents and insightful new interviews with parents and children on the autism spectrum. Accessible, informative, and supportive, this is an essential guide for parents of children with an autism spectrum disorder.