abhishreshthaa
Abhijeet S
Polygraph (Lie-Detector) tests:
the polygraph records physical changes in the body as the tests subject answers a series of questions. It records fluctuations in respiration, blood pressure and perspiration on a moving roll of graph paper. The polygraph operator forms a judgement as to whether the subject’s response was truthful or deceptive by examining the biological movements recorded on the paper.
Critic, however, questions the appropriateness of the polygraphs in establishing the truth about an applicant’s behaviour. The fact is that the polygraph records the biological reaction in response to stress and does not record lying or even conditions necessarily accompanying lying. Is it possible to prove that the responses recorded by the polygraph occur only because a lie has been told?
What about those situations in which a person lies without guilt (pathological liar) or lies believing the responses to be true? The fact of the matter is that polygraphs are neither reliable nor valid. Since they invade the privacy of those tested, many applicants vehemently oppose the use of polygraph as a selection tool.
the polygraph records physical changes in the body as the tests subject answers a series of questions. It records fluctuations in respiration, blood pressure and perspiration on a moving roll of graph paper. The polygraph operator forms a judgement as to whether the subject’s response was truthful or deceptive by examining the biological movements recorded on the paper.
Critic, however, questions the appropriateness of the polygraphs in establishing the truth about an applicant’s behaviour. The fact is that the polygraph records the biological reaction in response to stress and does not record lying or even conditions necessarily accompanying lying. Is it possible to prove that the responses recorded by the polygraph occur only because a lie has been told?
What about those situations in which a person lies without guilt (pathological liar) or lies believing the responses to be true? The fact of the matter is that polygraphs are neither reliable nor valid. Since they invade the privacy of those tested, many applicants vehemently oppose the use of polygraph as a selection tool.