There is no such thing as a lie detector test. The effectiveness of the test is in it's ability to gain a confession by making the person in question confess to a crime because he/she believes that the retarded thing actually works. Interviewing Officer says after initial probe/questioning" Um, sir were finding some inconsistencies in your statement about your past drug use, is there anything else you'd likie to tell us" You say , "No Sir". The machine is nothing more than a very expensive bluff. The only somewhat effective "lie detector test" is kineseology, in which an individual's body language is pathologically analyzed while being asked questions. Effective for someone not used to being interviewed/interrogated, but for someone who knows the game it's an easy thing to pass as well. Monotone voice, and limited body movements for them all is my advice. Think of your chick naked when ever your asked a question. LOL
By the way, I'm a former other governemnt agency contractor {Iraq} who had to take a poly for a clearance. It's a joke.....