I've said this before but not only am I an attorney, but my colleagues jokingly call me the firm girl scout since I am a stickler for best practices and legal ethics, and I would never take a polygraph. I have generalized anxiety disorder and I am sure I would fail no matter what the questions were. I have seen conference videos of me when someone caught me off guard and asked me questions about my very specialized area of practice and I looked so nervous and twitchy you would have thought I was a bum off the street instead of an expert in the field. Pop psychology and TV body language experts start with an expectation of complete neurotypicality. What they say makes for good drama but it's completely meaningless if you have a person with an underlying anxiety, mood, or sensory disorder.