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Is there any lie detector tests free online or voice detector?

Why don't we use Lie-Detector tests on criminals ?

  • Instead of a judge and jury. I understand that lie-detector tests are only right 99.999...% of the time but surely they can assist a verdict. And people can be bribed and swayed. If ...show more

  • Answer:

    Because its not 99.999% accurate. even in an argument from the biggest promoters of the polygraph, the example given is of of 87.5% accuracy, and 20% "inconclusive" results. That might sound good until you realize that of a 100 people tested in a murder case, about 10 innocent people would be found to be "lying," and 20 with "inconclusive" results. The latter might include both innocent people and murderers. Looked at another way, of a 100 murderers, 10 would be found to be telling the truth, and 20 would have inconclusive results. Out of 100 murders, 30 would not be identified, according to the accuracy assumed in the example.

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theyre inaccurate...and people can BEAT them

KERMUGE

Your figurs are way off.....lie detectors are not extremely accurate...as a matter of fact they fail to catch people in lies at a fairly high rate....so you are willing to let a criminal go because he is able to beat the test?

ohiofirefighter42

Most of the American Federal agencies admit that they can be beaten by someone who knows what they're doing, is a pathological liar or is just irrational. So basically they're not really much good, unless you believe everything you hear on daytime TV.

Pat

No, they are hardly ever right! The Polygraph is essentially pseudo-science, and quite rightly is not accepted in courts. All it does is measure some physical reactions, the results are down to the interpretation of the operator, and that makes it highly subjective, not a forensic tool at all. It is also very easy to fool, as has been demonstrated by many people, for example James Randi

Avondrow

Because they don't necessarily work! This is real stuff we are talking about, not the bloody Jeremy Kyle show! You can't potentially convict or acquit someone based on a toy which doesn't necessarily work properly.

Ryan

Because Jeremy Kyle isn't the Chief of Police.

AngeG

Polygraphs (lie detectors) are not very accurate at all. They are not allowed in court precisely because they cannot be proven to show when someone is telling the truth or not. Anyone who takes one just to satisfy the police is an idiot.

remowlms

Because hopefully, we will never be ready for trial by machine. Lie detector results, just like confessions, can be produced and faked; so they are not admissible as valid evidence and quite right too!

Bart S

They are highly inaccurate and you can train yourself to beat them very easily. Just because they use them on Trisha doesn't mean they work.

Marc S

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