The Advantages and Disadvantages of Lie Detectors

lie detectors

Lie detectors  are instruments used to assess the truthfulness of an individual. They are especially useful in a number of fields, including law enforcement, the military, and businesses.

During a polygraph test, several physiological functions are recorded. These include blood pressure, heart rate, respiration, and sweat level. The subject wears a cuff around the arm that measures these functions. Other tubes are fastened to the chest and abdomen, and electrodes that attach to the fingertips measure galvanic skin resistance.

Polygraphs are very useful in law enforcement, because they can detect deceptive behavior quickly and accurately. They are also convenient to use.

The Legal Implications of Lie Detector Tests in Criminal Investigations

Although lie detectors have a very high accuracy, they do have some problems. First, they have a tendency to classify innocent people as lying, even though they may have been completely honest when asked questions. Second, they can be unreliable when it comes to professional criminals.

Another problem is that the test can be influenced by the examiner’s emotions, which makes it difficult to trust. This can lead to false positive results, which can negatively impact the credibility of the results.

While there are a number of different lie detectors, the most common is the polygraph. These are used to assess the truthfulness of a person during interrogation and investigations. They have been in use since the early 20th century.

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