Autism Spectrum Disorder, or ASD, is the umbrella term used to describe a whole family of related conditions. Within this group, there is a subgroup of conditions known as PDD (NOS) - Pervasive Developmental Disorder (not otherwise specified) - which do not quite meet the diagnostic criteria of Autism or Asperger Syndrome. Written specifically for parents, this fully-updated second edition sets out what it means for a child to be diagnosed with ASD, PDD (NOS), autism or Asperger Syndrome, and explains where parents should go from there. The authors describe the signs and symptoms of each...