Having worked for a company that did psycometric testng for flight training... its a waste of time if not implemented properly. Because it was a university looking at the data - they were only interested in the score and nothing else. So 2 students that I had who were by far the hardest I have had (Neither of which made it to first solo) got onto the course because, although they were flagged in the interview as not likely to be successful, were entered into the course because they had a perfect score on the aptitude test. Both students were academically very intelligent but could not transfer that to hands on flying.