This thread is such a coincidence, as just a few days ago I learned that high IQ societies such as Mensa and Triple 9 accept SAT and GRE scores (from earlier years only) as qualifying scores. I had been reading a Slate article that defended the use of SATs in college admissions, fell down a Google rabbit hole, and found myself reading about this. I hadn't even heard of Triple 9 before. Anyway, I thought it sounded kind of nuts to use these achievement tests as proxies for IQ, especially when I realized that I would qualify for both societies (Mensa easily according to both tests, Triple 9 according to GRE scores, barely). In your professional opinion, aeh, do you think this approximation is justified? I have no skin in this game, as I have no interest in joining such a society, but I was a little startled as I have never had an actual IQ test and never would have pegged my own abilities that high. My DH would qualify for both as well, so that may explain a bit about our son...well, to some extent (his brain seems capable of feats that neither of us can quite understand).
