Zep wrote:You don't "Pass" or "Fail" a polygraph test. It is just a measuring system.
Yes, but that is not how some governments (or the Jeremy Kyle show) see it. You are either an IS supporter or not, a Chinese spy or not.
If yer ain't fer me yer agin' me!
The US Govt is actually using these things as if they give absolute pass/fail solutions.
I suspect it is not universal policy. Some individual government entities or units may indeed be using them occasionally, but there is very likely other motives behind it all. I gather Hoover was a big advocate of them purely for the scare value on ignorant FBI "suspects".
Even the Conservatives in the UK realised it would not be helpful to use them but the US and some other states totally view it as something that gives positive and negative results.
As I said above, they may well know all about it as well as we do, but their "subjects" may not.
From the back of my fuzzy brain cells I vaguely recall reading of a US police unit who tied down their criminal suspect in a chair and put a colander on his head attached by car jumper leads to the back of a photocopier. They then pretended it was a lie-detector. When they interrogated him they would throw a scare by hitting the COPY button and another page would appear with the words "He's lying!" written on it. Apparently it worked in that they got the guy to confess to something that previously he wouldn't. Probably apocryphal, but it describes the ignorance that polygraphs rely on.