[imacomputer2]

"The polygraph, for example, which measures physiological changes such as blood pressure, respiration and skin conductivity, only achieves an accuracy level of around 50%..."

Where does that statistic come from? I've definitely read that polygraphs have over 90% success as long as you account for obvious "counter measures". Basically, the person administering the test can clearly see if you are pulling tricks to defeat it.

[srean]

If you could point me to such a document would appreciate it. Curious to know if that is true.