These are inquiries employed during a psychophysiological detection of deception examination administered by law enforcement agencies. They are designed to elicit physiological responses that can be analyzed to assess the truthfulness of the individual being examined. An example includes asking a suspect if they were at the crime scene during the time of the incident, or if they know the victim.
The utilization of such inquiries can assist in investigations by narrowing the focus of inquiry, corroborating existing evidence, or potentially exonerating innocent parties. Their historical usage stems from early 20th-century efforts to measure physiological indicators of deception, evolving into standardized procedures used across numerous jurisdictions. Their role is to aid in the fact-finding process, providing supplementary information for investigators.
