Information on Lie Detection
Police and security agencies commonly use several lie detection methods to determine if a person is a criminal or to help in a criminal investigation. Lie detection is also a useful tool for employers and for people who suspect that someone they know is being dishonest.
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Types of Lie Detection
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The most accurate method to use is a lie detector machine that records physiological changes in the person in question such as increased heart rate, perspiration and blood pressure. Other methods include body language cues like lack of eye contact, or through interrogation of the person to find flaws in their suspected lie.
Users of Lie Detection
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The most common users of lie detection are law enforcement agencies like the police and prosecutors to solve a crime. Employers might also use lie detection methods in their recruitment process, and private citizens for personal matters.
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Considerations
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Lie detection is a controversial issue because it cannot provide conclusive evidence that a person is lying. It relies on general assumptions about human behavior and does not take individual differences into account. In the event of a criminal trial, additional evidence against a suspect should be sought to reach a guilty verdict.
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