Asperger's: Defined

Asperger's Syndrome, is a type of pervasive development disorder (PDD). PDDs are a group of conditions that involve delays in the development of many basic skills, most notably the ability to socialize with others, to communicate, and to use imagination.
Although Asperger's syndrome is similar in some ways to autism-- another, more severe type of PDD -- there are some important differences. Children with Asperger's syndrome typically function better than do those with autism. In addition, children with Asperger's syndrome generally have normal intelligence and near-normal language development, although they may develop problems communicating as they get older.
Autism and Your Child

Each child with an autism spectrum disorder will have his or her own individual pattern of autism. Sometimes, a child's development is delayed from birth. Other children with autism develop normally before suddenly losing social or language skills. In some children, a loss of language is the impairment. In others, unusual behaviors (like spending hours lining up toys) predominate.

For more information, visit: http://www.webmd.com/brain/autism/mental-health-aspergers-syndrome