Polygraph Accuracy

In order to understand the required accuracy of polygraph Polygraph Association, the top, as is done to determine the exact result. The official website of the APA, said: "The longevity of the polygraph test is a test of his power to those who are cheating" by using the kind of logic that alludes. Finally, it was the longevity of the medical practice of bleeding patients, to test his healing power? I suspect the life expectancy of some practices do not say anything if they are effective or not. But we will see more accurate measure supported by the EPA.
They complain that critics "do not understand polygraph testing, classify inconclusive test results as errors." His method of measuring only destroys all the evidence "inconclusive" - ​​that is a frequent consequence, among other things. Suppose now that there are 100 be tested in a group of 1,000 people, and the test correctly identified nine of them, while he was the identification of an honest man, with all other evidence "inconclusive." One might think this is a terrible consequence, because liars test 90% and the bad reputation of an innocent person is a liar, has been lost, but did not show the type of the EPA measures the accuracy of the polygraph test that these tests were 90% correct answers, the final results from 1009 have been corrected.
It seems suspicious? And what does it mean when there are no conclusive results? People take this "lying" to try to think clearly his name, but it feels a result "inconclusive"? The polygraph operator actually say to your boss or the police can not tell if you are honest, even if the car is very "accurate."
On its Web site that explains how to determine the accuracy, APA has used an example that shows 87.5% accuracy. I suppose it could mean that the test is wrong 12 out of 100 people called a liar honest, or perhaps lost 12 of the 100 murders. None of them seems to be the kind of precision that leads people to understand about this machine. Even 20% of the tests are not conclusive in his example. This means that if in the course of a murder case, likely would have seen that a distance of 05.01 meters with the label "may be the killer." He must inspire confidence in the use of the test to clear his name?
Interestingly, the example shows the APA with an accuracy of 87.5%, while in other parts of your website that cites two recent studies, only 80% and 81% to demonstrate accuracy. These lower numbers ignore all the results are inconclusive. Now we can begin to see the logic of section 7 of the American Association for Printing Office polygraph examiner list. "Carry a minimum of $ 50,000 or equivalent professional liability insurance"
There is a consensus among scientists that there is no scientific basis for polygraph tests. There are many stories of real spies who passed the test, and identify innocent people as criminals. A report by the National Academy of Sciences, U. S. Department of Energy, said the polygraph test was too imprecise to trust the security check may - just one of many studies showing the dangers to guess the lie.
The accuracy of the polygraph is a myth, but there is a reason that is promoted. The polygraph is designed as a tool of intimidation. If people believe that the works may be afraid to confess. This is perhaps the main goal to serve all