The old Stanford-Binet test was just an achievement test that measured expected knowledge against actual knowledge based on a standardized curriculum in American schools at the time.
My mother was measured at 165 on that scale in 1946. Although she was quintilingual and graduated first in her high school class, I can safely tell you that she was not out of this world smart. But she was pretty damn smart.
The test changed in the ‘50s and ‘60s to allegedly be independent of school curriculum. But it will always suffer from the basic fact that it has to be given in a native language and ask for comprehension of mathematical concepts which will vary depending on schooling. So it’s not obvious WhAT it’s measuring.
As for the Biden score, that’s beyond comical. The idiot has been talking gibberish since the early ‘70s.
Multiple brain aneurysms can’t avoid having shaved points from the score?