Polygraph - Wikipedia
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 …
Do “lie detectors” work? What psychological science says ...
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 …
How Do Polygraphs Work? - Psychology Today
Jun 29, 2022 · When people lie, their bodies tend to react in detectable ways. Polygraphs measure physiological changes in the cardiovascular system, breathing, and sweating. By …
Understanding Polygraph Testing: How Lie Detectors Work
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 …
Polygraph Frequently Asked 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 …
The Polygraph (Lie Detector) Test in a Nutshell
Jan 3, 2025 · Learn about polygraph (lie detector) tests, how they work, their use in criminal justice, and their admissibility in court.
What to Expect During a Polygraph Test - LegalClarity
Aug 5, 2025 · A polygraph test, often referred to as a “lie detector” test, measures and records several physiological indicators, such as blood pressure, pulse, respiration, and skin …