When my son was a toddler, he was diagnosed with a Pervasive Developmental Disorder (PDD). Up until 2013, this was the diagnosis given children who differed from and lagged behind their typical peers. The label signaled telltale behaviors: Repetitive movements, trouble with communication and socializing and preference for strict routine. Transitions were notably tough, as these children resisted change and often acted out.
Four years ago, this term was replaced. The American Psychiatric Association renamed Pervasive Developmental Disorders along with Childhood Disintegrative Disorder, and Aspbergers as Autism Spectrum Disorders (ASD).
Children on the Autism Spectrum can have broad differences in behavioral and intellectual functioning. Some people with ASD earn prestigious degrees, hold professional jobs and raise families. Others like my son Porter, have severe disabilities. Understanding where each child falls on the continuum can help target the therapy and education that will be most helpful.