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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A polygraph is an unreliable way to see if someone *knows* they are lying. If they are unintentionally telling a lie that would not be detected by the test.
It’s just measuring things like blood pressure, heart rate, etc. These things tend to change when we are lying. So if we do not know we are lying those things would not change.
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