AntiPolygrph.org
Stups,
Manipulating a polygraph "test" to produce a truthful outcome (regardless of whether or not you answer the questions truthfully) is easy.
I suggest you check out
AntiPolygraph.org. Be sure to download the
free book available there,
The Lie Behind the Lie Detector. The book explains the trickery behind polygraph "tests," and how to employ polygraph countermeasures to assure yourself of a “truthful” outcome.
Reading is a must for anyone here who is considering submitting to a polygraph "test." Even when answering all of the questions truthfully, those who are polygraphed run a substantial risk of being falsely accused by this arbitrary and unreliable pseudoscientific procedure. As matter of fact, with the "Control Question Test" (the most common polygraph format), it is the most truthful people who run the highest risk of false accusations.
The claims you hear of 90%, 99%, etc accuracy are bogus. These numbers are from studies done by less than impartial groups (American Polygraph Association, Department of Defense Polygraph Institute, etc), non peer-reviewed studies, and studies not conducted under field conditions. The fact remains that
the polygraph has never been shown to determine truth from deception with better than chance accuracy in a peer-reviewed study under field conditions .
This lack of accuracy is the reason that use of the "lie-detector" by private companies was abolished in by the 1988 Employee Polygraph Protection Act. Unfortunately, the government exempted itself from this legislation. Bodybuilding shows and fishing contests are among the only areas outside of government employment where this 1920s "technology" lives on..