polygraph


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.

detector

 [de-tek´ter]
a device by which an object or condition can be discovered.
image detector any recording medium used in radiology, such as film or a cathode ray tube.
lie detector polygraph.

pol·y·graph

(pol'ē-graf),
1. An instrument to obtain simultaneous tracings from several different sources; for example, radial and jugular pulse, apex beat of the heart, phonocardiogram, electrocardiogram. The ECG is nearly always included for timing.
2. An instrument for recording changes in respiration, blood pressure, galvanic skin response, and other physiologic changes while the person is questioned about some matter or asked to give associations to relevant and irrelevant words; these physiologic changes are presumed to be indicators of emotional reactions, and thus whether the person is telling the truth. Synonym(s): lie detector
[poly- + G. graphō, to write]

polygraph

/poly·graph/ (pol´e-graf) an apparatus for simultaneously recording blood pressure, pulse, and respiration, and variations in electrical resistance of the skin; popularly known as a lie detector.

polygraph

(pŏl′ē-grăf′)
n.
An instrument that measures the physiological responses of an individual to questions from an examiner who interprets the results as indicating the likelihood that the individual is telling or not telling the truth in giving the answers.
tr.v. poly·graphed, poly·graphing, poly·graphs
To test (a criminal suspect, for example) with a polygraph.

po·lyg′ra·pher (pə-lĭg′rə-fər), po·lyg′ra·phist (-fĭst) n.
pol′y·graph′ic adj.

polygraph

[pol′ē·graf]
Etymology: Gk, polys + graphein, to write
an apparatus for simultaneously recording several mechanical or electrical impulses, such as blood pressure, pulse and respiration, and variations in electrical resistance of the skin; popularly known as lie detector.
Commonly called a lie detector. An instrument that measures and records a test subject’s sympathetic nervous system responses—pulse, blood pressure, galvanic skin conductance due to sweating, breathing rhythms, and temperature—to a series of questions, on the premise that true and false answers produce distinctive patterns of response.

polygraph

Lie detector A device designed to detect deception by evaluating physiologic responses to various spoken questions, measuring and recording changes in electrical and mechanical impulses in various parameters–eg, bp, respiratory rate, galvanic skin reflex

pol·y·graph

(pol'ē-graf)
1. An instrument for obtaining simultaneous tracings from several different sources (e.g., radial and jugular pulse, apex beat of the heart, phonocardiogram, electrocardiogram). The electrocardiogram is nearly always included for timing.
2. An instrument for recording changes in respiration, blood pressure, galvanic skin response, and other physiologic changes while the subject is interviewed or asked to give associations to relevant and irrelevant words; the physiologic changes are presumed to be emotional reactions, and thus indicative of whether the subject is telling the truth.
Synonym(s): lie detector.
[poly- + G. graphō, to write]

polygraph

An instrument that simultaneously records changes in various physiological parameter such as pulse rate, respiration rate, blood pressure and skin resistance changes from sweating. These sensitively reflect alterations in the emotions and the device is used to detect deception in answers to questions. A ‘lie detector’.

polygraph

an apparatus for simultaneously recording several mechanical or electrical impulses, such as blood pressure, pulse and respiration, and variations in electrical resistance of the skin.
References in periodicals archive ?
The Court also ordered that after the polygraph test, threat perception of Verma will be analysed and only then any decision will be taken to withdraw the security.
S had admitted polygraph (lie-detection) evidence in any proceedings of trails with any purposes since the polygraph technique was not sufficient to satisfy to the Frye test, even in New Mexico which has been known having the most lenient standard for admission of such evidence.
Prof Grubin said: "We're then left with small group of high-risk individuals who we engage in polygraph testing.
Prof Grubin said: "It's to research new technology, there's limited evidence, but what evidence we have at the moment suggests an 80-90% accuracy, which is the same level of accuracy as polygraph testing.
PolyGraph is a four year, EU funded, collaborative research project composed of 14 partners: NetComposites, Imerys Graphite & Carbon, Avanzare Innovacion Tecnologica, YTRON Process Technology, University of Padova, SAIREM, Robnor Resins, NETZSCH Feinmahltechnik, Queen Mary University of London, Centro Ricerche Fiat, BAE Systems Advanced Technology Centre, SP Sveriges Tekniska Forskningsinstitut, the Institute of Occupational Medicine and HMG Paints.
service members, civilians, and contractors highlight the need to implement this Random Counterintelligence Polygraph Program.
The core technology of the polygraph is called "AI brain.
The polygraph, in contrast, measures and records several physiological characteristics, such as blood pressure, pulse, respiration, and skin conductivity, while the subject responds to a series of questions.
Lawyers instinctively pause to ponder and mentally parse the most basic, black-and-white questions before answering," Rizzo writes, "and when that happens during the polygraph exam, the needle on the polygraph machine tends to jump.
Upon returning to Namibia, she started the company SICS Polygraph where she works as a Forensic Psychophysiologist.
Brian London to seek an explanation of his statement that he found Filipinos difficult to polygraph.
SEX offenders could face polygraph testing as part of their licence conditions after research showed that those taking part in a pilot scheme were more likely to be truthful when talking to probation staff.