How Do Lie Detectors Work?

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Lie detectors work by measuring changes in heart rate, breathing, blood pressure, perspiration. The theory is that changes in these functions can indicate when a person is lying.
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How Lie Detectors Work
How Lie Detectors Work
For more than 15 years, Robert Hanssen led a double life. In one life he was a 25-year veteran with the Federal Bureau of Investigation (FBI) who had access to... More »
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Q&A Related to "How Do Lie Detectors Work"
To beat a lie detector test, try to avoid taking it in the first place. When this not possible, you will need to learn how to control your breathing and blood pressure. You will have
http://answers.ask.com/Science/Other/how_to_beat_a...
1. Find something suitable to use for the electrodes. You can use alligator clips, but that could end up being quite harmful to the person you are testing. You can use those electrode
http://www.ehow.com/how_2323711_build-lie-detector...
Not accurate enough to be allowed to be presented in court as evidence. However - as an investigative tool, it is helpful in interrogation and conducting iinvestigations.
http://wiki.answers.com/Q/How_accurate_is_a_lie_de...
http://www.fas.org/sgp/othergov/... Scientific Validity of Polygraph Testing: A Research Review and Evaluation. OTA concluded, therefore, that no overall measure or single statistic
http://www.quora.com/Lie-Detectors/What-is-the-acc...
Explore this Topic
If the Department of Health and Human Services feels like they need to do a lie detector, or polygraph examination they can, if they are searching for a criminal ...
Lie detector records various parameters such as Blood Pressure, Temperature of victim. When a person says lie, variations are noted in these parameters. ...
Because lie detectors, or polygraphs, rely on changes in heart rate, respiration, and perspiration to detect a lie, theoretically if you can control those, you ...
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