Autistic Spectrum Disorder is a developmental disability where there is a triad of impairments; social communication, social interaction and social imagination. Autism is called a spectrum as, although all individuals will suffer from difficulties in three main areas, their condition will affect them in very different ways. No two people with ASD will have the same difficulties. Asperger’s Syndrome is on the Autistic Spectrum.
The Handbook of High-risk Challenging Behaviors in People With Intellectual and Developmental Disabilities by James Luiselli Ed.D ABPP, http://www.amazon.com/dp/1598571680/ref=cm_sw_r_pi_dp_SPwdrb185YY9J