Previously, individuals with autism spectrum characteristics received a diagnosis of Pervasive Developmental Disorder, Not Otherwise Specified; Asperger’s Disorder; or Autistic Disorder, depending on their level of characteristics. All of these diagnoses have been combined to form a single diagnosis of Autism Spectrum Disorder.
There is no medical test, such as a blood test, for autism. Professionals who are appropriately trained can identify autism characteristics through observation and interaction, comparing observed behaviors to those expected of others the same age.
Additional assessments to be included whenever possible: