I'm confused. If you read Griggs vs Duke Power Company, it would seem to allow IQ tests if they can be shown to relate to job ability. For a programming job (or, indeed, a lot of jobs), IQ or "g" should be correlated with performance. Is there some other ruling or law which prohibits IQ tests?
They're allowed in principle, but in practice the law is so vague that for most companies it's not worth the risk of using an actual IQ test. Thus, we have "puzzles" instead.
