Yes... in fact, in my opinion I don't think they work
** NEW ANSWER **
Like any other piece of equipment, a polygraph instrument can have malfunctions and these malfunctions will prevent the exam from being conducted. If you are asking whether a malfunctioning polygraph can give incorrect test results, the answer is no. The examiner will either be unable to administer the exam at all, or some data will not be able to be collected adequately. - Michael Martin (President, Global Polygraph Network)
A malfunction indicator light comes on because a detector elsewhere in the item has noticed a malfunction in whatever it is monitoring.
California
yes people can it actually detects how nervous u are not really a lie detector
A lie detector test follows you pulse, if you are asked a question and your heart rate rises or falls then it will be a lie. If you can regulate your pulse you cannot be detected on a lie detector
The cast of Lie Detector - 2005 includes: Rolonda Watts as Host
AHH a lie detector ANSWER by Engl1sh: A perfessional typically uses the term 'polygraph' test.
Lie detector results are not admissible in the courts in the United States. On rare occasions, a defense attorney and/or a district attorney may conduct a lie detector test if there are doubts about a case.
Heart rate
Nope.
lie detector
Lie Detector
very