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Can someone fail a polygraph examination because they have high blood pressure or are nervous?

April 26, 2017fail high blood pressure nervous polygraph

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Can someone fail a polygraph examination because they have high blood pressure or are nervous?

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While a person’s heart rate and blood pressure may increase when they are nervous, a professional and experienced polygraph examiner understands this and will take it into consideration when evaluating the person’s physiological responses. A person’s physiological reactions when attempting deception are highly specific and are unlike general nervousness.