An examination of the validity of social subtypes in autism.

The validity of a social subtyping scheme forwarded by Wing and her colleagues is examined in a sample of 53 autistic individuals. Clinical ratings of subtype (aloof, passive, active-but-odd), IQ estimates, and measures of adaptive functioning and level of autism were obtained. Subjects were individually administered the Autism Diagnostic Observation Schedule (ADOS) by the principle examiner, who was blind to subtype assignment. The general findings supported the validity of aloof and active-but-odd subtypes as predictors of behavior across language/communication, reciprocal social interaction, and stereotyped behavior/restricted interest domains and suggested that individuals assigned to these respective groups differed in a number of important ways (e.g., level of autism, IQ, adaptive behavior). Partial support for an intermediate, passive subtype was garnered. The clinical utility of social subtypes is discussed as an important implication of this work.