Polygraph Test Results and Probability

Polygraph Test Results and Probability

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Author: mary daunis

This slide show illustrates how to calculate false positive and false negative polygraph test results.

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Polygraphs - what could go wrong?

There are two possibilities for an inaccurate polygraph test result. The first possibility is if the polygraph indicates that the subject lied when he/she actually did not lie. This is known as a false positive. The second possibility is a polygraph that indicates the subject told the truth when he/she actually lied. This is known as a false negative.

Polygraph Test Results

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