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Lie-detector technology has moved on from cumbersome polygraphs that measure physiological responses to questions.
Mechanical activity was recorded on a polygraph via isometric transducers.
One was setting up a polygraph, laying out the lie detector's telltale wires and cords.
He invented a lie-detecting machine called the polygraph.
Depending on the mode of recording, the signal has to be amplified for feeding a polygraph or digitized for recording on hard disk.
Well, I tell you what - No.1, polygraphs, truth detectors, lie detectors are not allowed in the courts, even down there in Aruba.
The subject was asked to stand up immediately and changes in the heart rate were noted in the polygraph.
He'd show them the communications center, neat gear such as polygraphs and Breathalyzers, demonstrate photography and fingerprinting, and generally try to show them a good time and build a positive rapport.
Traditional lie detectors, known as polygraphs, measure heart and respiratory rates as a person answers questions.
And it was a big turnaround for him to suddenly decry the use of polygraphs.
One of the points that Stephen Hatfill also made - and you're an authority on this, you know something about polygraphs given your former line of work in the Defense Intelligence Agency.
The results suggest that fMRI may one day prove a more accurate lie detector than the polygraph.
Objective responses are recorded on a polygraph trace.
But during her polygraph examination, the machine showed that her perspiration and skin resistance were abnormal.
Also within the Shaughnessy affidavit are details of polygraph - lie detector - evidence which throws the entire prosecution theory into chaos.
Accomplished liars will beat polygraphs, mislead interrogators, and hoodwink the most sophisticated security regime.
Dr Zuhair Bandar and his team at Manchester Metropolitan University say the system has already proved more accurate than traditional polygraphs.
He did not invent the polygraph, but he did design the Backster control question technique, called the zone technique.
Guilty people can also beat polygraphs by suppressing their physiological reactions with the help of mental countermeasures such as meditation or physical ones such as drugs.
They found out that polygraphs did not detect these people lying.