As far as all the battery of psychological tests most of us here on PC have taken multiple times, I actually have no idea how accurate of useful they are. I am not a psychiatrist or psychologist. I just don't know. As for the various academic tests out there, those I do know quite a bit about. And what I have learned after 8000 years of schooling and test-taking and test-writing is that test-taking is a skill. It's something you can get much better at if you so choose. An average test-taker can, in fact, become outstanding if they work hard enough. That's been my experience, anyway. Anyhow, because I believe it is really a skill, I do not consider academic testing to be a good or accurate predictor of future job performance. Just my take. Lastly, IQ testing only measures a very narrow band on the total spectrum of what constitutes human intelligence. It is, therefore, in my opinion, of very little predictive value.