Asperger Syndrome is one of several previous separate sub-types of autism that were folded into the single diagnosis autism spectrum disorder in 2013. Asperger Syndrome is a type of pervasive developmental disorder. It is characterized by major difficulties in social interaction, restricted repetitive and stereotyped patterns of behavior, interests and activities, delays in the ability to socialize with others, to communicate and to use imagination. Individuals with Asperger Syndrome are higher functioning and have average or above average intelligence.
Individuals with Asperger Syndrome may develop an intense, obsessive interest in something and are exceptionally talented or skilled in a particular area. Darius developed an obsessive fascination with trains, buses, and transit systems as part of his condition. According to experts in the field, people with Asperger Syndrome struggle with the unpredictability of life and feel secure within the cataloged system of their interest.