Author(s) :

Y SAI MOHAN.

Volume/Issue :

Abstract :

The human lie detector polygraphy forensic exam, often known as a polygraph test, is a routinely used instrument in forensic investigations to assess persons' honesty by monitoring physiological reactions. This summary offers an overview of the polygraph test's major aspects, its applicability in forensic situations, and its limits. This article explains how forensic polygraph assesses the relevance and constitutionality of the evidence. A polygraph is a device that detects changes in the body. Because most individuals, includes knowledgeable "lie catchers,' are unable to determine many techniques have been developed to help identify lies when someone is telling them. With the advent of science and technology, advanced means of lie detection have been created, removing the need for authorities to employ third-degree torture. The modern polygraph was invented in the early 1920s to record changes in a variety of physiological features, with equipment designed to record changes in breathing, cardiovascular activity, and sweat gland activity (forerunners to the present polygraph) arriving in the 1930s. Since then, the use of the polygraph as a 'lying detector' has been fraught with controversy, with supporters and detractors exchanging jabs based on incomplete facts and whole views. Polygraph exams are utilized in a variety of forensic settings, including criminal investigations, pre-employment screening, and security clearances. The polygraph's position in forensic investigations and its inherent controversies, implying a need for ongoing study and review to increase its reliability and acceptance within the legal system.

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