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American inventor Leonarde Keeler testing his improved polygraph on Arthur Koehler, a former witness for the prosecution at the 1935 trial of Richard Hauptmann. A polygraph, often incorrectly referred to as a lie detector test, [1] [2] [3] is a pseudoscientific [4] [5] [6] device or procedure that measures and records several physiological indicators such as blood pressure, pulse, respiration ...
A Polygraph is a duplicating device that produces a copy of a piece of writing simultaneously with the creation of the original, using pens and ink. Patented by John Isaac Hawkins on May 17, 1803, it was most famously used by the third U.S. president, Thomas Jefferson , who acquired his first polygraph in 1804 and later suggested improvements ...
Leonarde Keeler (October 30, 1903 – September 20, 1949) was an American inventor best known for co-inventing the polygraph.He was named after the polymath Leonardo da Vinci, and preferred to be called Nard.
John Augustus Larson (11 December 1892 – 1 October 1965) was a police officer and forensic psychiatrist and became famous for his invention of the modern polygraph device used in forensic investigations. [1] He was the first American police officer with an academic doctorate and to use the polygraph in criminal investigations.
William Moulton Marston (May 9, 1893 – May 2, 1947), also known by the pen name Charles Moulton (/ ˈ m oʊ l t ən /), was an American psychologist who, with his wife Elizabeth Holloway, invented an early prototype of the polygraph.
The system was developed in the United States by John E. Reid in the 1950s. Reid was a polygraph expert and former Chicago police officer. The technique is known for creating a high pressure environment for the interviewee, followed by sympathy and offers of understanding and help, but only if a confession is forthcoming.
A polygraph (from Ancient Greek: πολύς, poly = "many" and γράφειν, graphein = "to write") is an author who writes in a variety of fields. [ 1 ] In literature, the term polygraph is often applied to certain writers of antiquity such as Aristotle , Plutarch , Varro , Cicero and Pliny the Elder .
Sarah Elizabeth Marston (née Holloway; February 20, 1893 – March 27, 1993) [1] was an American attorney and psychologist.She is credited, with her husband William Moulton Marston, with the development of the systolic blood pressure measurement used to detect deception; the predecessor to the polygraph.