Law & Criminology

Law & Criminology - Coursework

1. Summarize the means by which the polygraph works as a lie detector. What two major problems call its accuracy into question?

A polygraph which is also known as 'lie detector' is a device specifically designed for measuring and recording various physiological indexes such as pulse, blood pressure, skin conductivity, and respiration while the subject is inquired about and he/she answers to wide-ranging queries. The conviction supporting the usage of polygraph for lie detection is that the deceptive responses to queries will be producing a different sort of physiological response from those related to non-deceptive responses ...