CVSA, my definition which I feel accurately describes this toss-a-coin procedure - Completely Void of Scientific Assessment.  That type of test in unproven, widely untested and completely unreliable.  It would sadden me to find out that you are disqualified because of it.  If that happens the agency you applied with should be subjected to a revocation of certification from any national group such as CALEA.  Good luck.  Hopefully they won't trip you up.