Even “The Bell Curve” used an intelligence test that didn’t return a bell curve at all. They said they had to turn it into a bell curve to prevent ‘skew’
Isn’t that just a ceiling effect? They have roughly 100 items, and the AFQT is designed to screen out the dumb (to avoid recruiting them into the military), not measure the normal or the brilliant. So the right tail gets chopped off and heaped (everyone answering 90-100 questions right; remember that there’s always random error in answering individual questions), even though the rest looks just like a normal distribution.
Isn’t that just a ceiling effect? They have roughly 100 items, and the AFQT is designed to screen out the dumb (to avoid recruiting them into the military), not measure the normal or the brilliant. So the right tail gets chopped off and heaped (everyone answering 90-100 questions right; remember that there’s always random error in answering individual questions), even though the rest looks just like a normal distribution.