"We never saw any of this ADHD or autism stuff when I was young!"

You never saw any photos of the surface of Mars back then either, but I'm pretty sure it was still there the whole time

@Garwboy ADD & Autism were added to the DSM (III) in 1980 & neither were commonly diagnosed until the late 80s. So they're right...
@scottgal @Garwboy improvements in diagnosis capability don't change the prevalence though.
@mawhrin @Garwboy They do if the diagnosis didn't exist before. Autism for example was diagnosed as 'childhood psychosis / shizoid disorder' and the children often locked away for life https://blogs.uoregon.edu/autismhistoryproject/topics/childhood-psychosis-or-schizophrenia/#:~:text=Before%20autism%20existed%20as%20a,in%20life%20was%20notoriously%20difficult.
Childhood Psychosis or Schizophrenia – The Autism History Project

@scottgal @Garwboy Autism became tied to a lot more services and support than the older classifications of developmental delay or 5th percentile IQ. Autism diagnostic criteria, for the purposes of child services, are sufficiently broad that every parent, physician, and teacher of a cognitively disabled child is going to assign that label and get those services. We certainly did for our oldest.

@scottgal @Garwboy

ADHD was called by other names long before that. The behaviors were recognized as being similar to those exhibited by people with frontal lobe injuries.