I don’t have the firmest grasp on the way a polygraph functions, but I’ve just had this thought a lot.
Could a polygraph help people uncover repressed memories? For example if a person suspects they were being harmed as a child, but can’t remember details, could a polygraph help them get more answers? Like by asking specific questions maybe related to what a person suspects happened and detecting how they respond.
Or, is a polygraph only useful to detect truth/a lie about things someone is certain about and remembers fully?
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Polygraph is designed to measure your nervous system’s response to being asked a question, or giving your answer. If you genuinely feel.your answer is truthful (or don’t recall it not being so) then the test will not say you are lying. In the same way if you can control your emotions and autonomic response very well, you can fool the test. It is actually very well documented that the test is not infallible.
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