2006-06-26 12:06:32 · 16 answers · asked by raccoon51194 1 in Local Businesses ➔ United States ➔ New York City
Because the technology is fairly unreliable, so it isn't conclusive proof in any case, and in any case it would be a violation of the suspect's Fifth Amendment rights to not be compelled to testify against themselves.
2006-06-26 12:10:14 · answer #1 · answered by AndiGravity 7 · 0⤊ 0⤋
Lie detector tests are highly inaccurate. If a person is nervous when taking one, they will be found guilty by heart rate and BP. If a person is a sociopath, they heartrate and BP as well as temperature are typically lower. Most sociopaths can actually beat lie detector tests.
Another way for the common man to beat a lie detector test, is by taking something like Benedryl before they go in for their test...
Easily beaten...ineffectual.
2006-06-26 12:12:14 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Lie Detector tests are not foolproof (remember the George Costanza character from "Seinfeld" saying: "It's not a lie if you believe it"). A polygraph test measures blood pressure and heart rate. It is a fallible procedure. Some people are just pathological beyond belief (and the most likely criminals certainly fit the bill).
2006-06-26 12:13:01 · answer #3 · answered by kcsilverlining77 4 · 0⤊ 0⤋
because there is a significant margin of error. lie detector tests read vital signs in our bodies (heart rate, breathing, and sweating) that are affected when a person lies. a person's heart rate and breathing rate increases when they are lying. it also increases if they are nervous, scared, angry, or for a number of reasons that have nothing to do with guilt or lying. this is unreliable causing a false positive test. some people also don't experience any changes when they lie, causing a false negative.
2006-06-26 12:11:25 · answer #4 · answered by jkelmagic 3 · 0⤊ 0⤋
Lie detector tests are not 100% reliable, with some training you can learn to beat them.
2006-06-26 12:10:02 · answer #5 · answered by eggman 7 · 0⤊ 0⤋
They have made innocent people look guilty because they detected deception when the person was telling the truth. The condition of your nervous system dictates what the machine will do.
2006-06-26 12:25:58 · answer #6 · answered by normy in garden city 6 · 0⤊ 0⤋
because it based on your vitals and very good liars who are always calm may b able to fool the test
making it lok like there tellling the truth
when theyre not
and lie dectectors dont give u all the information
2006-06-26 12:10:10 · answer #7 · answered by a.h. 2 · 0⤊ 0⤋
Because lie detectors are not accurate and usually not even acceptable in court as evidence
2006-06-26 12:10:07 · answer #8 · answered by brand_new_monkey 6 · 0⤊ 0⤋
#1 you can fake / beat it
#2 nervous system is diff for other people = fauls reading
#3 works on a fear factor.. if you believe they will catch you
2006-06-26 12:14:21 · answer #9 · answered by stillhappy89 4 · 0⤊ 0⤋
because there is so many laws protecting crminals and stuff plus lie detecors can't really be 100% accurate
2006-06-26 12:10:09 · answer #10 · answered by Anonymous · 0⤊ 0⤋