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How to pass/invalidate a lie-detector test.
They are not considered admissible evidence in court (but the criminal justice system still use them to a degree..), and they can be interpreted with intentional bias, so I think it's fine to share.
One of my psychology professors told me that if you hide something like a sewing needle in your shoe's insole, you can ever so slightly apply pressure so that the poke causes a physiological spike. They monitor for movement, so it has to be very minute. The goal is to do this on every control question so that they cannot establish a baseline and have to give up.
I remember seeing some cop show a long time ago where they couldn't figure out how this guy kept screwing up their lot detector tests they were forcing him to take. They found out he was putting a tack under his big toe and using this trick so they scheduled him for another test, but they kept moving him from one building to another looking for the room they were supposed to be in, forcing him to walk a lot.
I think I remember that one as well. Likely was CSI or something