Definitions for Polygraph
ˈpɒl ɪˌgræf, -ˌgrɑfpo·ly·graph

Princeton's WordNetRate this definition:3.0 / 2 votes

1. polygraphnoun

   a medical instrument that records several physiological processes simultaneously (e.g., pulse rate and blood pressure and respiration and perspiration)

WiktionaryRate this definition:4.0 / 1 vote

1. polygraphnoun

   A device which measures and records several physiological variables such as blood pressure, heart rate, respiration and skin conductivity while a series of questions is being asked to a subject, in an attempt to detect lies.

2. polygraphnoun

   An mechanical instrument for multiplying copies of a writing, resembling multiple pantographs.

3. polygraphnoun

   A collection of different works, either by one or several authors.

4. polygraphverb

   To administer a polygraph test.

   The FBI polygraphed the suspect but learned nothing because they already knew he was lying.

WikipediaRate this definition:0.0 / 0 votes

1. Polygraph

   A polygraph, often incorrectly referred to as a lie detector test, is a device or procedure that measures and records several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity while a person is asked and answers a series of questions. The belief underpinning the use of the polygraph is that deceptive answers will produce physiological responses that can be differentiated from those associated with non-deceptive answers; however, there are no specific physiological reactions associated with lying, making it difficult to identify factors that separate those who are lying from those who are telling the truth.In some countries, polygraphs are used as an interrogation tool with criminal suspects or candidates for sensitive public or private sector employment. US law enforcement and federal government agencies such as the FBI, DEA, CIA, NSA, and many police departments such as the LAPD and the Virginia State Police use polygraph examinations to interrogate suspects and screen new employees. Within the US federal government, a polygraph examination is also referred to as a psychophysiological detection of deception (PDD) examination. The average cost to administer the test in the United States is more than $700 and is part of a $2 billion industry.Assessments of polygraphy by scientific and government bodies generally suggest that polygraphs are highly inaccurate, may easily be defeated by countermeasures, and are an imperfect or invalid means of assessing truthfulness. A comprehensive 2003 review by the National Academy of Sciences of existing research concluded that there was "little basis for the expectation that a polygraph test could have extremely high accuracy." The American Psychological Association states that "most psychologists agree that there is little evidence that polygraph tests can accurately detect lies."The control question test, also known as the probable lie test, was developed to overcome or mitigate the problems with the relevant-irrelevant testing method. Although the relevant questions in the probable lie test are used to obtain a reaction from people who are lying, the physiological reactions that distinguish lies may also occur in innocent individuals who fear false detection or feel passionately that they did not commit a crime. Therefore, although a physiological reaction may be occurring, the reasoning behind the response may be different. Further examination of the probable lie test has indicated that it is biased against innocent subjects. Those who are unable to think of a lie related to the relevant question will automatically fail the test.

ChatGPTRate this definition:0.0 / 0 votes

1. polygraph

   A polygraph is an instrument used to record physiological responses from an individual, such as changes in pulse, blood pressure, and perspiration rates. It is most commonly known as a "lie detector" and is often used in criminal investigations, though its accuracy is controversial. The term can also refer to a process or test during which such equipment is used.

Webster DictionaryRate this definition:5.0 / 1 vote

1. Polygraphnoun

   an instrument for multiplying copies of a writing; a manifold writer; a copying machine

2. Polygraphnoun

   in bibliography, a collection of different works, either by one or several authors

3. Polygraphnoun

   an instrument for detecting deceptive statements by a subject, by measuring several physiological states of the subject, such as pulse, heartbeat, and sweating. The instrument records these parameters on a strip of paper while the subject is asked questions designed to elicit emotional responses when the subject tries to deceive the interrogator. Also called lie detector

4. Etymology: [Gr. writing much; poly`s much, many + to write: cf. F. polygraphe.]

WikidataRate this definition:0.0 / 0 votes

1. Polygraph

   A polygraph measures and records several physiological indices such as blood pressure, pulse, respiration, and skin conductivity while the subject is asked and answers a series of questions. The belief underpinning the use of the polygraph is that deceptive answers will produce physiological responses that can be differentiated from those associated with non-deceptive answers. The polygraph was invented in 1921 by John Augustus Larson, a medical student at the University of California at Berkeley and a police officer of the Berkeley Police Department in Berkeley, California. According to Encyclopædia Britannica, the polygraph was on its 2003 list of greatest inventions, described by the company as inventions that "have had profound effects on human life for better or worse." The efficacy of polygraphs is debated in the scientific community. In 2001, a significant fraction of the scientific community considered polygraphy to be pseudoscience. In 2002, a review by the National Academies of Science found that testing can discriminate lying from truth telling at rates above chance, though below perfection. These results apply only to specific events and not to screening where it is assumed that polygraph would work less well. Effectiveness may also be worsened by counter measures.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Polygraph

   pol′i-graf, n. an instrument for multiplying copies of a writing: a collection of different books.—adjs. Polygraph′ic, -al.—n. Polyg′raphy, voluminous writing: art of writing in various ciphers.

Matched Categories

1. • Medical Instrument

How to pronounce Polygraph?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

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   Fred

   US English

   Tessa

   South African

How to say Polygraph in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of Polygraph in Chaldean Numerology is: 2

2. Pythagorean Numerology

   The numerical value of Polygraph in Pythagorean Numerology is: 1

Examples of Polygraph in a Sentence

1. Tara Reade:

   What kind of precedent does that set for survivors of violence ? does that mean were presumed guilty and we all have to take a polygraph ? I will take one if Joe Biden takes one.

2. Barry Morphew:

   I’ve never been asked to do a polygraph, there is nothing that I am hiding. I have given three – 30 hours of testimony to the FBI and the CBI. I’ve answered every question. Every single question.

3. Hillary Clinton:

   He took a lie detector test. I had him take a polygraph, which he passed, which forever destroyed my faith in polygraphs, oh, he plea bargained. Got him off with time served in the county jail, he’d been in the county jail about two months.

4. Tommy Potter:

   … He fully cooperated with investigators, he did some things that a person who is normally guilty for this type of crime, they would not do. He kept in contact with her family. So no, it does not surprise me that he passed the polygraph. He was a suspect for a number of years, but based on the most recent investigation, we were able to eliminate him as being a suspect.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=Polygraph
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Polygraph
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Polygraph
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/Polygraph
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=Polygraph
7. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=Polygraph