The Preliminary Credibility Assessment Screening System, or PCASS, captures less physiological information than a polygraph, and uses an algorithm, not the judgment of a polygraph examiner, to …

The American Polygraph Association, established in 1966, is the largest polygraph association consisting of examiners in the private, law enforcement, and government fields.

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 …

Sep 18, 2022 · The polygraph is not a lie detector but rather an instrument that measures a person’s physiological changes to questions posed by the examiner. An elevated physiological response to a …

Aug 10, 2025 · Polygraph tests, often called “lie detector tests,” measure and record physiological indicators while an individual answers questions. They aim to assess the truthfulness of a person’s …

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 …

A polygraph test works by measuring someone’s physiological responses, which are believed to change when a person is lying. The polygraph, often referred to as a lie detector, is an instrument that …

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.

The National Polygraph Association must recognizes the enormous potential for good through the use of the polygraph. We must pledge ourselves to identifying and eliminating any unqualified persons from …

Polygraph examinations are used to verify the truth and determine deception. In both civil and criminal matters, polygraph examinations can enhance an investigation by helping to clear the innocent and …