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 …

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 examiner watches for fight-or-flight responses as you answer specific questions. This piece explains the science behind polygraph technology and shows what physical signals these machines …

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 …

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 …

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 …

Apr 30, 2025 · Federal agencies have stepped up their efforts over the past few weeks to find potential leakers, and some — like the FBI, the Department of Homeland Security and the Department of …