lie detector

(redirected from lie detectors)
Also found in: Dictionary, Thesaurus, Medical.
Related to lie detectors: Lie detector test

lie detector,

instrument designed to record bodily changes resulting from the telling of a lie. Cesare Lombroso, in 1895, was the first to utilize such an instrument, but it was not until 1914 and 1915 that Vittorio Benussi, Harold Burtt, and, above all, William Marston produced devices establishing correlation of blood pressure and respiratory changes with lying. In 1921 an instrument capable of continuously recording blood pressure, respiration, and pulse rate was devised by John Larson. This was followed by the polygraph (1926) of Leonarde Keeler, a refinement of earlier devices, and by the psychogalvanometer (1936) of Walter Summers, a machine that measures electrical changes on the skin. A more recent innovation are devices, first developed in 1970, called psychological stress evaluators or voice stress analyzers, which measure voice frequencies from tape recordings.

Although the lie detector is used in police work, the similarity of physical changes caused by stress and such emotional factors as feelings of guilt to changes caused by lies has made its evidence for the most part legally unacceptable. An assessment of such devices by National Research Council (an arm of the National Academy of SciencesNational Academy of Sciences,
with headquarters in Washington, D.C., a private organization of leading American scientists and engineers devoted to the furtherance of science and its use for the general welfare.
..... Click the link for more information.
) found that they also were too unreliable to be used in screening for national security purposes, but they are widely used for such purposes nonetheless, sometimes with inconsistent results from one government agency to another. The use of lie detectors to screen employees and job applicants is highly controversial.

Bibliography

See E. B. Block, Lie Detectors, Their History and Use (1977); C. Gugas, The Silent Witness (1979); D. T. Lykken, A Tremor in the Blood (1981); K. Alder, The Lie Detectors: The History of an American Obsession (2007).

lie detector

[′lī dī‚tek·tər]
(engineering)
An instrument that indicates or records one or more functional variables of a person's body while the person undergoes the emotional stress associated with a lie. Also known as polygraph; psychintegroammeter.
References in periodicals archive ?
I also need to know where I can take her for a lie detector test.
"It is quite plausible that this could be one of the tests used in a lie detector monitoring the nose and people's reaction.
Offenders will be given lie detector tests to make sure they are keeping to the conditions of their release.
A report published in October 2002 said lie detector tests were mostly inaccurate and, in more than a century, had failed to catch a single spy.
The lie detectors will initially be used for three months and customers will be informed if they are being monitored.
EIGHT factory workers have been ordered to take lie detector tests in the hunt for a thief who stole a computer.
However, just suppose scientists did, sometime in the future, develop the perfect system and lie detectors became a standard gadget, an app on our smartphones or a piece of software connected directly into our brains.
It has been 'confirmed' that the lie detector will return to the Love Island villa in the coming weeks and bosses on the ITV2 show have said that it is 'essential to test the relationships'.
WASHINGTON -- Supreme Court nominee Brett Kavanaugh played down the importance and reliability of lie detector tests during his confirmation hearing.
Jason Hubble from Lie Detectors UK has offered free polygraph tests for Wallasey Labour party
DEMAND for lie detector tests has rocketed, fuelled by popular reality TV programmes like the Jeremy Kyle Show.
I am hooked up to a lie detector, a device now used by TV inquisitors like Jeremy Kyle to expose the whoppers told by lowrent love rats.