Is a lie detector 100% or is it true?

Question

everyone at my job must take a lie detector test for thief incident, i'm just wondering if you can fail the test and tell the truth and vis versa

how do you beat a lie detector test

how do you beat a lie detector test

Answer 1

Yes it is possible for a lie detector to give a false positive or negative. It is measuring how your body is acting and not what is going on in your mind. If you are a very relaxed and confident liar, you can beat the machine. If you are extremely nervous and worrying that the machine will wrongly implicate you, then it is possible for you to get too nervous and set the machine off.

No court will allow it as evidence. Let that be your first indicator.

Here is a fun article about it
http://www.damninteresting.com/?p=222

Answer 2

The polygraph (lie detector) is a joke. It measures physiological changes often associated with lying. If you don't have those reactions when lying, you can easily slip by (and millions have). These reactions can easily be triggered simply by being nervous, as many are when doing a polygraph, even if they are innocent.

It's all bs and not likely to be admissible in court. It's all about psyching out the employees so the thief will come forward, not about getting actual answers from the tests.

Answer 3

Lets say your a nervous person and you had to submit to a lie detector test. All you can think about is what if this polygraph thinks I'm not being truthful. All of the sudden your stress level rises. Who's to say that test isn't going to recognize that as a lie.

Answer 4

In many research cases, persons found guilty in court passed their lie detectors with flying colors....also many innocent people failed it...

In psychology, there are many theories concerning whether physological responses cause emotions or if emotions cause responses. Many experienced criminals can lie without an increase in blood pressure and heart rate. More evidences prove that emotions cause physiological responses, therefore resulting in the idea that nervousness over a polygraph detector can cause sweating and high blood pressure....therefore lie detectors are not nearly close to being 100 percent.

Answer 5

No, they can not be trusted 100%. the fundamental basis that this "lie detector" uses is body resistance changes. It is based on the basic idea that if you are telling the truth, your body remains cool and calm, while if you are lying, your body sweats. The problem is, some people will sweat more from the truth than from a lie because of what they happen to be feeling at the time.

Answer 6

Lie detector tests used to be used in Courts. They are no longer used becuse they have been proven to give inconsistent results. In other words, they detect lies sometimes and don't detect them sometimes. This makes them a very poor form of evidence.

They are still commonly used and accepted in many places. Take the Maury Povich show for intance.

Answer 7

They are pretty accurate but not 100%. But if you did something you should not have, it is not wise to think that you will beat the lie detector.

Answer 8

You can confuse the lie detector by pressing your toes on the floor or biting your toung to make you hurt. just do that even when they ask you your name and they'll see that something is wrong with the lie detector. you gotta be carefull and not get caught though

Answer 9

Lie detectors can be beaten, and can sometimes give false results even when someone isn't trying to beat them.

But before you take it check your contract, if it doesn't say they can do this then don't take it

Answer 10

Reading the polygraph is a fine art that takes a load of skill.

There are ZERO regulatory agencies to determine who is actually qualified.

and, my personal favorite:

"It's only a lie if you BELIEVE it's a lie."
- George Castanza