Before that, an IQ from 51-75 was classified as a moron, from 26-50 was an imbecile and 25 or lower was an idiot. But it stigmatized people and made them feel bad.
I've got a nephew who is autistic and has an IQ in the 130+ range. Mrs. May has a point here. Kids can't get the kind of help they need unless we can determine what kind of help they need.
Autism was not heard of when I was growing up, if you couldn't hack it 8n school they had special schools for those kids.