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 …

Schedule a polygraph test for cheating partners, infidelity, addiction denials, false accusations, family conflicts, and more. Multi-state-licensed and certified.

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 …

A polygraph exam simultaneously records multiple involuntary physiological responses — breathing, blood pressure, heart rate, and electrodermal activity — while a trained examiner asks a structured …

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 …

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 …

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 comparing the …

Dec 27, 2025 · Polygraph evidence, popularly known as lie detector results, intersects science, law, and trial strategy. Courts in the United States generally treat polygraph findings with caution due to …

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.