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I don't think there is any significant difference in accuracy between an analog polygraph device and a digital (computerized) device. Keep in mind that both are built around the same flawed theories and the results of both are up to interpretation of and manipulation by the examiner.
I think the questioning scenarios will depend upon the circumstances under which you are being examined. If it happens to be for pre-employment screening for law enforcement or intelligence positions, check out some of the literature available at this site. Otherwise, I think there is a good chance that you will see all three types of questions - relevant, control and irrelevant. Note that control and irrelevant questions are not the same and serve different purposes. I recommend you read The Lie Behind the Lie Detector if you absolutely must submit to a polygaph exam.
Posted by: Darren Jensen Posted on: Apr 24th, 2004 at 6:18am
I have an upcoming polygraph test that I cannot avoid, and am wondering if a computerized test is more accurate compared to the classic test. I'm told that it is, but based on the information I've read here I'm doubtful.
Also, I'm told that there will be three sets of three questions. Does that mean that there will be one or two control questions in each segment, or that there will be nine questions with a couple of control/irrelevent questions?