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 …

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? 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 …

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 …

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.

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 …

There are a few polygraph instrument providers in the market and most of them are american made. The Polygraph Guy uses a variety of polygraph instruments from different manufacturers to ensure that …

Dec 29, 2025 · In this comprehensive guide, we’ll explore what a polygraph test entails, its accuracy, and how you can prepare for it. With the right knowledge, you can approach your polygraph exam …