To all evidence, polygraphs are snake oil. A skilled operator might wring a confession out of an ignorant examinee now and then, but a proof? Ridiculous.
To all evidence, polygraphs are snake oil. A skilled operator might wring a confession out of an ignorant examinee now and then, but a proof? Ridiculous.Polygraph "testing" has no scientific basis: it's a fraud that depends on the examinee's ignorance and fear of the procedure. You might be interested in AntiPolygraph.org's free book on polygraphy, The Lie Behind the Lie Detector, which can be downloaded here (503kb PDF):
http://antipolygraph.org/lie-behind-the-lie-detector.pdf