OCBuckWife
I am the evil monkey in your closet
Wingate1217;1102218; said:I don't know many of us who would get "away" with this question. Technically taking an pen or pencil from the office is stealing. So in my mind I would have to answer yes to that question. I don't really know how the "lie detector" works. If it doesn't bother me that I took a pencil from work) would it show up as a lie if I answered yes to the question?
Lie detectors work on the assumption that an untruth causes autonomic responses in your body, like elevated heart rate, perspiration, deeper or heavier or faster breathing, and blood pressure. If a lie doesn't make those things happen a lie detector is more apt to register a "truth" or a null. Lie detector tests rely on the assumption that someone will feel guilty enough for his/her body to betray them regardless of the answer.
You hear about lie detectors all the time in police investigations, and sometimes a person applying for a job will have to undergo a polygraph test (for example, certain government jobs with the FBI or CIA require polygraph tests). The goal of a lie detector is to see if the person is telling the truth or lying when answering certain questions. When a person takes a polygraph test, four to six sensors are attached to him. A polygraph is a machine in which the multiple ("poly") signals from the sensors are recorded on a single strip of moving paper ("graph"). The sensors usually record:
Sometimes a polygraph will also record things like arm and leg movement. When the polygraph test starts, the questioner asks three or four simple questions to establish the norms for the person's signals. Then the real questions being tested by the polygraph are asked. Throughout questioning, all of the person's signals are recorded on the moving paper.
- The person's breathing rate
- The person's pulse
- The person's blood pressure
- The person's perspiration
Both during and after the test, a polygraph examiner can look at the graphs and can see whether the vital signs changed significantly on any of the questions. In general, a significant change (such as a faster heart rate, higher blood pressure, increased perspiration) indicates that the person is lying.
When a well-trained examiner uses a polygraph, he or she can detect lying with high accuracy. However, because the examiner's interpretation is subjective and because different people react differently to lying, a polygraph test is not perfect and can be fooled.
They are not accepted as legal evidence in almost any court as far as I understand it because they have never yet been proven to be an exact science. They are subjective based on the testers experience and interpretation of the bodily responses as recorded on the graph.
Here's some links. Scroll to the bottom.
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