The polygraph was created in 1921 by policeman John Larson, based on research by the psychologist William Marston. It records changes in pulse, blood pressure, sweating and breathing to ascertain whether a subject is lying. While cinema depictions suggest the device is near-infallible, the US Supreme Court ruled, in 1998, that there was no consensus that the polygraph was reliable, a finding supported by the US National Academy of Scientists in 2003.
Who first stated that the polygraph might not be reliable?
The Supreme Court of the United States The National Academy of Scientists The psychologist William Martson The Federal Bureau of Intelligence