They weren’t IQ tests, but results tended to be correlated with IQ.
When you are testing for reasoning, analysis, etc those are exercising the the same parts of the brain as an IQ test.
When you make a test such that you can just memorize grammar rules and know facts, you’re assessing the willingness of the candidate to study, or have access to study materials.
Depending on the job, it may not matter at all. Your IQ over a moderate threshold is irrelevant to many occupations.
