With its graph- root, polygraph indicates that it writes out several different results. A polygraph's output consists of a set of squiggly lines on a computer screen, each indicating one function being tested.

Within the US federal government, a polygraph examination is also referred to as a psychophysiological detection of deception examination. [11]

POLYGRAPH definition: an instrument for receiving and recording simultaneously tracings of variations in certain body activities. See examples of polygraph used in a sentence.

The polygraph, invented in 1921, is today's most widely trusted lie-detection device.

Aug 5, 2004 · During a polygraph test, an interviewer or interrogator asks the subject a series of questions designed to elicit truthful answers and lies, then measures physiological changes in …

What is a polygraph? A polygraph, most commonly referred to as a lie detector, is a machine that is used by law enforcement to test the physiological responses of individuals to certain questions.

What is a polygraph? The term "polygraph" literally means "many writings." The name refers to the manner in which selected physiological activities are simultaneously recorded. Polygraph examiners …

A polygraph or a polygraph test is a test which is used by the police to try to find out whether someone is telling the truth. Hill's lawyers announced she had taken and passed a polygraph test. …

A polygraph is not a “lie detector”; it's a device that measures physiological stress responses like heart rate, blood pressure, and breathing, which an examiner then interprets to infer deception.

Mar 26, 2025 · The polygraph is a tool commonly used in law enforcement to test whether defendants, witnesses, and other individuals who are party to a criminal case are being truthful or deceptive. It’s …