polygraph

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polygraph

an instrument for the simultaneous electrical or mechanical recording of several involuntary physiological activities, including blood pressure, skin resistivity, pulse rate, respiration, and sweating, used esp as a would-be lie detector

Polygraph

 

a multichanneled oscillograph for simultaneously recording readings of several physiological functions, such as respiration, blood pressure, brain and muscle bioelectricity, and motor reactions. The most common type is the general-purpose polygraph, a multichanneled oscillograph that records with ink various bioelectric and nonelectric processes by means of appropriate biological sensors and adapters. The polygraph is used in physiological experiments to investigate interacting and interdependent bodily functions; it is also used in clinical diagnosis.

polygraph

[′päl·i‚graf]
(engineering)
References in periodicals archive ?
There have long been doubts over the accuracy of polygraph machines but some forensic scientists believe a polygraph is 90 per cent accurate.
Although confounding the polygraph machine, suspicious cops Chris Penn and Michael Rooker are convinced of his guilt, only for Roth to begin turning the tables, deflecting attention away from himself and starting a tense battle of wits.
Phil is rigged up to a polygraph machine while our behavioural analyst asks him a series of questions and the results are analysed.
Jason is put under the spotlight and wired up to Lie Detector's polygraph machine to see what is really going on.
The accused is wired up to a polygraph machine just like the ones used by the courts in the USA and then they are asked to tell their side of the story to presenter Dominic Green.
Stagg, 33, answered 60 questions for ITV's The Cook Report while wired up to a polygraph machine.
Western governments do not rely on polygraph tests!Ms Maryanne Njihia, a psychologist at Hekima Counselling Services in Nairobi, says the metrics tested by polygraph machines can vary because they focus on body functions that can be as a result of other underlying issues which are unrelated to the issue at hand.Moreover, theres no evidence that any pattern of physiological reactions is unique to deceptions, she adds.
On second thoughts, it might not be a good idea to hire Ms Devine's Lie Detector company for she would probably need to replace her polygraph machines after them being burned out from overwork this week.
Polygraph machines are unreliable, and useless when the power has gone, which is for 18 hours a day now in rural police stations, when there is no loadshedding.
The Punjab Forensic Science Agency is one of the greatest achievements of the provincial government, with state-of-the-art facility, equipped with polygraph machines, DNA analysis and computer forensic capabilities.