James,
The innate problem with the whole psycometric approach to airline recruiting is that it attempts to compare apples to oranges.
The tests are designed to show whether someone has the basic aptitude to have a high probability of passing airline training. This is fine if trying to pick between non-qualified applicants. The fact that it can disqualify a highly experienced pilot with a proven track record is ridiculous. The fact that it can act IN FAVOUR of someone with a history of problems and poor judgement is just as bad.
I am firmly of the opinion it should be used to screen Cadet applicants and that's all.
(Before the obvious reply is made, I went through the Qantas system, one of the most Phsyco-babalic of them all, and was successful (I turned them down). At the same time, a lot of good guys who were great pilots fell foul of this system- a terrible loss to them AND the airline which would have benefitted from their service.)