How does the polygraph work to determine whether someone is truthful or deceitful?
A. The polygraph machine measures a respondent’s brain activity while answering questions
B. The polygraph examiner determines whether the respondent’s responses to questions are consistent with evidence obtained about the respondent.
C. The polygraph machine measures a respondent’s physiological responses (heart rate, respiration, etc.) while answering questions.
D. The polygraph examiner can tell by looking at the respondent whether or not a respondent is being truthful.
Answer: C. The polygraph machine measures a respondent’s physiological responses (heart rate, respiration, etc.) while answering questions.
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