How a lie detector test works - BBC News
How a lie detector test works - BBC News How a lie detector test works - BBC News Posted: 12 Sep 2012 12:00 AM PDT An increasing number of companies in India are offering lie-detector tests to individuals and companies trying to catch out deceitful spouses and cheating employees. One such company, Helik Advisory, which has been operating for a year, says it is getting more enquiries about its polygraph tests every day. Using a number of sensors attached to the body, physiological changes can be used to determine whether someone is telling the truth. A major change in any pattern, also known as a "response conflict", is a sign a person is lying. Polygraph tester Deepti Puranaik put the BBC's Rajini Vaidyanathan through a lie detector to show her how the technology works. You are subscribed to email updates from "lie detector test online" - Google News . To stop receiving these emails, you may ...