I don't know how IQ tests are supposed to be conducted, but when I first heard of Raven's matrices in middle school, I jokingly asked all my friends to do it. W

I don't know how IQ tests are supposed to be conducted, but when I first heard of Raven's matrices in middle school, I jokingly asked all my friends to do it. What struck me at that time was that for almost all of my friends, there were no questions that were too difficult to be solved, but there was a pretty large variability in the time taken to complete the test. For some of the friends, answering the questions required a lengthy logical deduction process; for others they almost picked the answer just by intuition and then justified it afterwards. At that time my takeaway was that an IQ test with a generous time limit probably meant nothing, but an IQ test with a strict time limit could probably test intuition. That said the utility of testing intuition still isn't clear to me.