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How Is High-Functioning Autism Diagnosed? Explained

High-functioning autism is not an official medical diagnosis, but it’s commonly used to describe individuals on the autism spectrum who have average or above-average intelligence and fewer challenges with language. These individuals may still struggle with social interaction, emotional regulation, and repetitive behaviors.


Diagnosing high-functioning autism involves a comprehensive evaluation by specialists, typically including developmental pediatricians, psychologists, or neurologists. The process often includes:

  • Developmental history review
  • Observation of behavior and communication
  • Standardized autism screening tools like the ADOS (Autism Diagnostic Observation Schedule)
  • Input from parents and teachers


Because symptoms can be subtle, especially in verbal and intelligent children, diagnosis may not occur until later in childhood or even adolescence. Early signs may include difficulty with peer relationships, sensory sensitivities, intense focus on interests, or difficulty understanding social cues.


At All Star ABA, we use these insights to tailor Applied Behavior Analysis (ABA) therapy, helping children improve social skills, emotional understanding, and daily functioning.


Frequently Asked Questions

  • What age is high-functioning autism usually diagnosed?

    Often after age 4, but sometimes not until school age.



  • Can high-functioning autism be missed?

    Yes, especially if verbal and intellectually advanced.



  • What tests are used?

    ADOS, interviews, observations, and developmental assessments.



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