DifferentVector:
You bring up a very interesting question. One I have given thought to in the past. What if your test was the standard for all safety sensitive activities? Would attempting to operate motor vehicles or airplanes while found cognitively impaired by the test leave you subject to criminal charges in the same way as alcohol impairment currently does? It could never be kept out of government's arsenal. Look at traffic cameras and smog testing. I'm very surprised that DNA testing for genetic disease markers has not become the standard for medical insurance acceptance yet.
I don't believe people really want an objective test if there is any possibility that the results may be used against them in any way. But a trustworthy test which could be correlated with actual performance would be a handy research tool indeed.
Best regards,
Westhawk