YouTubers are upscaling the past to 4K. Historians want them to stop

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[–]ReeferMadness 2 insightful - 1 fun2 insightful - 0 fun3 insightful - 1 fun -  (1 child)

They don't work reliably, and can easily be tricked when you know you are being tested. But there is a response to lying and it does change your heart rate and breathing rate. If you don't know you are being tested you can't trick it.

It can still be an incredibly powerful tool.

[–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

Again, there is no consistent physiological response exclusively for lies. The response, that only some people have, is in response to elevated moods like anxiety. They don't work, at all, for anyone who has anxiety. They're unreliable for everyone else, and in particular lack scientific grounding in both validity and reliability (They don't detect lies - not valid - and unreliably detect what they do detect).

The point really needs to be driven home: There is. No. Physiological. Response. Solely. For. Lies. There are simply myths that people have variously invented about such responses, like the claim you "look to the left", that've been invented to more easily excuse chasing people on zero evidence.