THE AMERICAN INSTITUTE OF POLYGRAPH TECHNOLOGY
AND FORENSIC PSYCHOPHYSIOLOGY

        The polygraph chart presented above is a screenshot of an actual polygraph test. It is a typical chart produced by a state-of-the-art computer polygraph recording on 5 channels. 2 channels record the subject's respiration, 1 channel records the Galvanic Skin Resistance, 1 channel records cardiovascular activity and the remaining channel records certain physical activity. The test questions asked during the test are indicated as R1 to R10 at the bottom of the chart. They are short and direct questions requiring a 'yes' or 'no' answer.