And anecdotely, IQ style testing has been by far the most determinant data point for successful software developer hires in my experience. I'm almost at the poi

And anecdotely, IQ style testing has been by far the most determinant data point for successful software developer hires in my experience. I'm almost at the point where I might start to believe it is more important than domain knowledge of programming. This is likely because the type of work I typically hire for has a large amount of problem solving and troubleshooting as opposed higher level system design. Which is essentially what IQ tests test for. The world "intelligence" is just a very loaded word and means different things to different people. IQ tests show how well a person can solve puzzles and make connections between systems. Which many consider to be a sign of intelligence. But not everyone.