Review on Polygraph Testing in Clinical Forensic Psychology

Abstract

Polygraph tests are widely employed as forensic tests in investigations and in legal proceedings. The aim of this study is to demonstrate how physiology and psychological techniques operate in lie detection or Polygraph provides a contribution to scientific methods of criminal investigation. Lie detector tests use a polygraph machine that consists of different parts to measure the changes in the physiological aspects (usually respiration, electro dermal activity, relative blood pressure, and often peripheral vasomotor activity) of a person while answering questions or reacting to statements. Polygraph testing is still used in certain contexts, its validity and reliability are matters of ongoing debate within the scientific community. Many experts argue that it should not be the sole basis for making high-stakes decisions. Polygraph tests are used frequently in many fields, such as law enforcement, national security, and private investigations etc. The constitutional validity of Polygraph Test is still unanswered. Thus, government should enact new legislation regarding application of lie detectors in criminal justice. So that, our legal system take better advantage of rapid advances in scientific tools which work as judicial aids.