ABSTRACT
A DSM diagnosis of autism spectrum disorder (ASD) requires symptoms be met for two primary criteria: (A) deficits in social communication and interaction; and (B) symptoms of restricted, repetitive behavior patterns. One meta-analysis comparing high-functioning autism (HFA) with Asperger's syndrome (AS) found that although HFA had later onset of language, by the time youth were in their teens there was minimal difference between the two groups. Other studies have shown that children with AS perform better on Verbal IQ and theory of mind tasks than children with HFA. One of the most striking features of individuals diagnosed with ASD is the nature of developmental regression associated with the disorder. The K-3 Paradigm is an important reminder of the need to integrate knowledge from development, contexts of influence and different theoretical perspectives in order to appreciate the complex nature of children's disorders.
