Researchers argue the term "high functioning autism" be abandoned by the scientific community as it is misleading and may create harmful expectations of abilities for children on the autism spectrum. "High functioning autism" is not a diagnostic term. The term is based on IQ assessments rather than functional assessments. While children with ASD may exhibit normal-to-higher IQ for their age, many experience skill based, social and behavioral difficulties that impact their daily lives.
Some children who are accurately diagnosed in early childhood with autism lose the symptoms and the diagnosis as they grow older, a study supported by the National Institutes of Health has confirmed.