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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 ...
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.
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.
Pages in category "Polygraph" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. A. American Polygraph Association; B.
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.
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.
Chromograph, Copygraph, Polygraph; Flexography; Spirit duplicator (also Rexograph, Ditto machine, Banda machine, or Roneo) Lithographic processes Transfer lithography; Anastatic lithography; Autographic process; Offset lithography; Photolithography; Stencil-based copying methods Papyrography; Electric pen, invented by Thomas Edison; Trypograph ...