“Lie Detector”

By Jamestown McGee

Intro

Picture a young girl who just ate a candy bar without permission.  Her mom says, “Naughty child.”  But the child says that she didn’t do it.  How will the mom ever know the truth?  A “Lie Detector” is machine that supposedly tells whether someone is lying or telling the truth.  In this report you will find out: How the whole machine Works, The History, and The Style.  Please, continue.

How the whole machine Works

Do they really work?  Well no not…not really.  They can tell the truth sometimes. There isn’t really a “lie detector”.

How do they work?  From Wikipedia.com (the online dictionary), they say,” A polygraph (commonly yet incorrectly referred to as a lie detector) is a device that measures and records several physiological variables such as blood pressure, pulse, respiration and skin conductivity while the subject is asked and answers a series of questions. The measurements are posited to be indicators of anxiety that accompanies the telling of lies. Thus, measured anxiety is equated with telling untruths. However, if the subject exhibits anxiety for other reasons, or can control his anxiety level voluntarily, a measured response can result in unreliable conclusions. A polygraph test is also questionably used as a psychophysiological detection of deception (PDD) examination.”  So that’s how they work.   

The History

Do lie detectors lie themselves?  Yes, yes they do.  According to Bill Softky’s article “Will there ever be a real ‘Lie Detector’?” from Saturday 31 st March 2007 10:02 GMT, “First, the problem with hiding your lies, the "false negative" problem. Ordinary polygraphs measure simple things like breathing, blood pressure, and skin electricity; presumably, when you get lie you get tense, and glitches in those measurements give you away. But the problem is that those signals are different for everyone. And since there is no common "lying blood pressure" or "lying skin resistance," the test needs to calibrate it for you individually: someone needs to determine your own personal *difference* between "lying" and "truth-telling" measurements.”  (the web site is ‘http://www.theregister.co.uk/2007/03/31/bill_softky_lie_detectors/’)  Summery: They do.

The Style

What do they look like?  (See the last page.  This picture is from Wikipedia.com) They look like a brief case on the out side but a…a… well a lie detector on the inside.

Conclusion

In conclusion, you might think of “Lie Detector" as a liing little thing.

 


              Bibliography

 

 

Bibliography

http://www.howstuffworks.com

Brain, Marshall

How GPS Receivers Work

7 April, 2007

Great article

  

Bibliography

http://en.wikipedia.org/wiki/Polygraph

Wikipedia

Polygraph

25 April, 2007

This article tells you about the whole deal w/ "Lie Detectors.

 

Bibliography

http://www.truthout.org/docs_2006/010207A.shtml

Baker, Dean

Iraq War Lie Detector Test

27, April 2007

This article tells about the test of the lie detector on January 2, 2007.