General Question

luigirovatti's avatar

Is it true that, in a criminal trial, the lie detector test carries "moral weight", though is not admissible?

Asked by luigirovatti (2820points) March 14th, 2021

It was said by a character of “Anatomy of a Murder” (1959 movie), though I don’t know if it sticks with facts. Let me know what you think. :)

Observing members: 0 Composing members: 0

6 Answers

hello321's avatar

The polygraph, or “lie detector”, test is complete pseudoscience, and should not be admissible.

luigirovatti's avatar

@hello321: I don’t believe it either, if you want to know.

Darth_Algar's avatar

No. It’s absolute junk science. A completely innocent person could fail due to sheer nerves. A someone who’s guilty as hell could pass with flying colors because they’re able to keep calm. There’s a reason polygraphs are inadmissible in court. Why anyone, in this day and age, still puts stock in them is beyond me.

Tropical_Willie's avatar

Actually “lie detector” tests are only wrong 10 % to 20 % of the time so . . .they are not like finger prints or DNA and are not evidence.

80 % to 90 % they carry weight but the test is not perfect. The test can be “gamed” if you know what to do.

elbanditoroso's avatar

Anatomy of a Murder, although a good book (not such a great movie) was made 60 years ago. Forensics and lie detection have vastly improved since then.

AK's avatar

When it was proven that a lie detector test can be manipulated with practice and mental control, its ‘weight’ became nonexistent. We live in times where even a confession on camera is not always admissible as evidence, why should anyone even bother with the archaic lie detection methods? Anyway, if people still think there’s any weight associated with this test, it could only be psychological weight – not moral or legal weight. Psychologically, we all know that our heart beats faster and we start sweating when we lie….so, it is natural for people to link that to people undergoing lie detector tests and assume that the spikes in the test are because the person is lying…it is a psychological association. Morally, we should all refrain from judging another person, until there is conclusive evidence. That is the moral we should all abide by…we usually aren’t that good moral wise but still, that is the right moral to abide by….so, that message in the movie was wrong. Morally and scientifically wrong.

Answer this question




to answer.

This question is in the General Section. Responses must be helpful and on-topic.

Your answer will be saved while you login or join.

Have a question? Ask Fluther!

What do you know more about?
Knowledge Networking @ Fluther