The autistic Triad of Impairments includes: 1) social impairment; 2) verbal and non-verbal language impairment; and 3) repetitive/stereotyped activities. A seemingly similar ADHD Dyad of Impairments includes: 1) inattention, and 2) hyperactivity or impulsivity.
The question, then, becomes one of: Do the ADHD impairments find a basis for their existence within the autistic impairments? It would seem, in this context, that the ADHD inattention impairment could be attributed to a kind of autistic language impairment, while the ADHD hyperactivity or impulsivity impairment could be attributed to a kind of autistic repetitive/stereotyped impairment activities (anxiety and/or obsessive-compulsive).
But, what about the autistic social impairment? Well, if autistic repetitive/stereotyped activities are significantly based in Social Anxiety Disorder, it could be argued that the triad/dyad comparison is complete. Severity would definitely play along with any connection between the two disorders.
So, would ADHD be its own spectrum coexisting side-by-side with autism, or would it be a part of a larger, combined, neurological spectrum like, say, Autism Spectrum Disorder (ASD) and the cadet Broader Autism Phenotype (BAP) which shares the autism spectrum, where the symptomology is quite similar but, still part of the overall spectrum?
I can see the appeal of so many autism-ADHD similarities suggesting something more than coexistence. But, when BAP isn't yet officially a diagnosis, let alone recognized as a subspectrum concept, I believe it could take years to achieve an even broader autism spectrum.
Last edited by AspieUtah on 27 Sep 2016, 6:01 pm, edited 1 time in total.