[Double_Org]

There is a lot of scientific support for pre-employment screening (selection). The most conclusive evidence comes from a series of absolutely enormous studies conducted by the US military in the 80's known as project A.

That being said, there is a great deal of pseudo science being gobbled up by organizations because this is a mostly unregulated industry.

[mywittyname]

IIRC, the outcome of these studies were that intelligence is the best predictor of job performance. The ASVAB is essentially an IQ test with some domain knowledge questions sprinkled in.