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 …

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 …

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 …

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 …

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.

During the Pre-Test Interview, the examiner explains how the polygraph works, discuss the issue in-depth that is under investigation, develop and review all questions that will be asked on the …

Feb 12, 2026 · Polygraph exams — whether counterintelligence, lifestyle, or full-scope tests — can be part of certain cleared roles. But when you’re recruiting talent, the question arises: Is asking a …