Polygraph test

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Numerous factors can trigger a polygraph test to produce a false positive, including high blood pressure, pregnancy and drugs or alcohol. Lie detector tests don't actually test whether you're telling the truth; rather, they test whether you're nervous or excited, so false positives can occur.

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How Does A Polygraph Test Work? Test Aesthetic, Polygraph Test, Im Sorry Quotes, Sorry Quotes, Pbs Kids, Heart Quotes, Think Tank, Dark Photography, Heart Rate

In this video excerpt from NOVA scienceNOW, learn about polygraph tests and lie detection. Correspondent and New York Times technology columnist David Pogue commits a staged crime and undergoes a polygraph test to find out how it works. Lying can cause stress, which produces common physiological responses, such as an increased heart rate and sweating. Polygraph testing experts explain what the test measures, why the questions are reviewed in advance, and why the test doesn't always work…

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