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Article: Lie catchers stand by their polygraphs; Experts say even best liars show measurable changes.(LIFE - SCIENCE & TECHNOLOGY)
- Article from:
- The Washington Times (Washington, DC)
- Article date:
- June 29, 2006
CopyrightCOPYRIGHT 2006 The Washington Times LLC. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Byline: Christian Toto, THE WASHINGTON TIMES
Detective Leonard Keeler developed the first lie detector - or polygraph - test in the 1930s, and the machines used today are not very dissimilar from that first model.
Even the best liars can get tripped up by their own bodies as the devices detect changes in blood pressure, breathing rate and perspiration levels, which could indicate a person is being less than honest.
Although some people can say they "beat" the polygraph on occasion, experts say it can't be done regularly.
The science may seem simple, but it's far from foolproof. That's why polygraph tests are not admissible in court and ...