While high-functioning autism was never an official diagnosis in the Diagnostic and Statistical Manual of Mental Disorders published by the American Psychiatric Association, it was a classification in the DSM-4 for individuals with autistic disorder but do not have an intellectual disability (an IQ of 70 or more). In the present diagnostic standards of the DSM-5 the classification of HFA is no longer used and has been replaced by 3 support levels for autism spectrum disorders.Typically cases of high-functioning autism are diagnosed by 35 months of age, much earlier than those of Asperger syndrome; this is possibly due to the delay in speech and language development. Some characteristics used to diagnose an individual with autism include persistent deficits in social communication and social interaction, along with restrictive, and repetitive patterns of behavior.