05-22-2012, 12:57 AM
Join Date: Apr 2012
| | Re: Polygraph accuracy?
A polygraph is a tool to help get to the truth. It is not a completely accurate indicator of truth.
I've witnessed probably 60 of the damn things. Many times they would facilitate a confession from someone who was hiding things. Sometimes people were showing deception on a particular question because of the way a question was worded, although there was zero wrongdoing on their part. I've also see a couple where deception was not indicated, but where the party clearly was, and was later proven to be untruthful.
It's a tool, but I consider it junk science to some degree. There are some great examiners out there, but I don't think they're in the majority. The simple impropper wording of a question can really throw off results.
Someone really "jacked up" on the whole "voodoo, mind reading capability" of the polygraph can really psyche themselves into a "deception indicated" or "incolclusive" result, even if they're telling the truth.
A great tool to get a confession from a guilty party. Not so great to accurately, in and of itself, reveal the truth. Of course very few examiners will ever admit or even self acknowledge such a thing, because it's their job.