Re: Realism check: How accurate are lie detectors?
They are stress detectors, not lie detectors. When used right they mix in innocent questions with "everyone's guilty of this" questions at the start, then get to what they want to know. If you stress out over the innocent questions and calm down on the EGOT ones, the baseline is screwed up. Keep it up during the stuff the want to know and the results are futzed up.
It ain't magic, it's a rough guide at best. Polygraphs are beaten all the time.
I don't know what you're taking classes in, Bunny, but if it's cop-stuff, they shouldn't lie to you like that.