4 ms·
It's borderline useless. And can do lots of harm if assumed that it's useful.
by greenhatman 8y ago
It's borderline useless. And can do lots of harm if assumed that it's useful.
- joshvm 8y agoI wouldn't disagree with that. And a big problem is that innocent people tend to produce stress reactions when interrogated, leading to false positives. It would be appropriate to call a polygraph a "fear" detector, since that's basically what it's measuring. But still, the "science" isn't entirely bunk: some people do panic when they lie - though I read an anecdote that said this is a weirdly American trait (Europeans can cheat the polygraph more easily) - but it's virtually impossible to sift out the true positives from the noise.