Pre-Employment Tests: What Is Lie Detector and If It’s Legal?

Pre-Employment Tests: What Is Lie Detector and If It’s Legal?

Employers use different tests to screen prospective employees. One of the most notorious tests is a lie detector or polygraph test. A lie detector test combines interrogation methods with physiological measurements to obtain information. The polygraph equipment usually records such phenomena as respiration, heart rate, blood pressure while a candidate is responding to a series of “yes/no” questions. As a result you have a so-called polygraph chart that is interpreted by specialists to reveal deception. The problem with lie detector is that it does not detect deception in any direct manner, but rather measures certain physiological responses that are supposed to be stronger if somebody is lying. The polygraph test […]