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The first polygraph was invented in 1917 and was used for counterintelligence work during World War I. In 1938, the FBI began using polygraph examinations. The first polygraph to be used in a courtroom as evidence was on Dr. Francis Sweeney; a chief suspect in the Cleveland torso murders. He failed the polygraph test but was released later due to lack of evidence.
Polygraph examiner
The polygraph test is not "proof-positive". The polygraph test is not completely unreliable.
the first wonderers conducted science by?
parts of a polygraph machine
The first census was conducted in 1957 in Kuwait
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)
AHH a lie detector ANSWER by Engl1sh: A perfessional typically uses the term 'polygraph' test.
The polygraph is commonly used during criminal investigations to determine whether a suspect is telling the truth.
Pythagoras conducted the first experiments in acoustics.
American Polygraph Association was created in 1966.