For purposes of lie detection, investigators have most commonly made use of a(n)

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Polygraph testing, also known as lie detection testing, is the most commonly used method by investigators for determining the truthfulness of a person's statements. The polygraph measures physiological responses like heart rate, blood pressure, and respiration rates which can indicate deception or nervousness. While other technologies like PET scans or electroencephalographs may provide valuable insight into a person's brain activity, they are not as widely used for lie detection purposes.

For Purposes of Lie Detection, Investigators Have Most Commonly Made