Polygraph examinations are generally conducted in four phases: * Phase I: Preliminary Preparations * Phase II: Pre-Test Interview * Phase III: Examination Proper

Polygraph examiners attempt to detect deception by looking for exceptional recordings on a subject’s polygraph charts. Hence, questioning techniques

Advantages * The polygraph instrument is a legacy system with a long history of use in law enforcement. * While it may

In Criminal Investigations A polygraph examination, also known as lie detection, is a diagnostic test given to someone whose honesty

Reliability and Validity The polygraph instrument is a scientific instrument that is designed to sense and record the physiological changes

A polygraph examination can be used as a technical aid during the course of an investigation. It can help verify

The polygraph machine or “lie detector” is an instrument or device that produces recordings of physiological phenomena that could be

This is the body’s main coordinating system. It takes all the input from the environment that enters the body

The polygraph is a device that measures and records a variety of physiological indicators, such as blood pressure, pulse, respiration,

In their attempts to detect deception, people have used various methods throughout the years – most of them do not involve