A suspect is attached to the lie-detector apparatus and asked questions about the crime.The questions deal with aspects of the crime only known by the police and the actual law-breaker.Which procedure is this?

Question

Quizplus · Accepted Answer

The procedure described is the concealed knowledge test (also known as the guilty knowledge test), which involves asking questions that only someone with knowledge of the crime would be able to answer correctly. This is different from the relevant/irrelevant procedure, which uses a mix of relevant and irrelevant questions to detect deception, and the psychological stress evaluator, which measures physiological responses to determine if someone is lying. The lie-control test is not a valid or reliable method of detecting deception.

A Suspect Is Attached to the Lie-Detector Apparatus and Asked