Does a lie detector realy work?

[Sandman77]

I see many story's on discovery

That FBI using lie detectors, does this device realy work?

[WitawatWatawit]

If my ex-missus was on the program, then yes, most definitely.

[bkkjames]

hardly Thailand related.

but ok I will play along.

What's your favourite Ice Cream?

[krisb]

I prefer the KGB techniques for finding if you've been lying personally. FBI lie detections for pussies.

[CharlieH]

Ex wife had a great method, she would wait until I was aroused, then place a sharp carving knife under my testicles and say "make me believe".

She always got the truth.... everytime !

[WitawatWatawit]

Truth or dare, huh Charlie? You do like to live life on the knife edge.

[kotsak]

[Display]

Only if you believe in it.

[Swiss1960]

you don't need a lie detector, your (soon-to-be-ex-) wife was pretty honest with you when she told you to p*** off (equals no-more-sex-for-you-honey) once the house was built.

[mania]

I see many story's on discovery

That FBI using lie detectors, does this device really work?

No they are not reliable & usually are not admissible in courts of law because of it.

Reason is lie detectors ( Polygraph) work on the assumption that people give

off certain physiological indicators when they lie. Basically indicating stress rise

Yet a nervous person like that Thai lady on the video in this clip could have been obviously

nervous/stressed just taking the test & trying to understand another language.

Or also the opposite a person may have a very cool demeanor/low heart rate & come off as

truthful.

Some folks have even played the machine by disregarding the question in their mind

& instead ask themselves a new question which gives the correct response.