Polygraph tests

[goatboy]

Are lie detectors really that accurate? Here's a scientific study of the subject.

http://www.youtube.com/watch?v=UGMD8cL6IjE

[Angelo222]

Are lie detectors really that accurate? Here's a scientific study of the subject.

http://www.youtube.com/watch?v=UGMD8cL6IjE

The polygraph is basically a toy and operators can influence the results by changing various parameters. I wouldn't personally trust any of them because it is commercially driven.  The science behind the polygraph is sound enough but unfortunately as everyone's physiological reactions to stimuli are so different that you can never tell for sure if the results you are getting are valid. The other point worth mentioning is that the psychopath has no sense of right or wrong and no empathy with their victims thus they do not trigger the polygraph in the same way as others do.

[goatboy]

Exactly, David, and if they were infallible or had any significance at all they would be routinely used by the police and courts in this country (though polygraphs are admissable in US courts aren't they?). The fact that they are not says it all really. May as well toss a coin to establish whether or not a suspect is telling the truth.

[Tim Invictus]

If only polygraphs were accurate there would never be a MoJ and courts would be all but redundant. If you look at any scientific research on them you will see they are nothing more than a psychological tool and should never be taken seriously.

Are you listening Roach? Only an idiot would have such reliance on their results!

[John]

I just had a quick nosey at blue and see that the polygraph has become the centre of discussion with Sandra Lean and her Shetland pal Billy.  Seems the Government want to use such tests if they show someone is guilty but don't want to use them if they say they are innocent.

Goes without say this could only happen in SCOTLAND!  ..aye lass...that'll be richt!