Fundamentals of Polygraphy
The polygraph is a device that measures and records a variety of physiological indicators, such as blood pressure, pulse, respiration, and skin conductivity, during questioning. The name is derived from the Greek words “poly” (many) and “graphos” (writing). Essentially, you can derive the meaning of “many writing” which is rather accurate since the machine records the various physiological responses already mentioned.
Polygraphy is the procedure used to attempt to detect deception with the use of the polygraph instrument. This is based on the theory that deceptive answers will give readings that are markedly different from honest ones.
In some countries, this is used to interrogate criminal suspects by investigators and candidates for sensitive jobs by human resource teams.
However, it must be noted that the American Psychological Association has stated that “most psychologists agree that there is little evidence that polygraph tests can accurately detect lies.” Hence, calling it a “lie detector” is rather a misnomer, or wrong naming.
Significant Personalities in Polygraphy
Timeline of the Modern Polygraph
- Jacques D’Arsonval By Henri Manuel – http://ihm.nlm.nih.gov/images/B01033, Public Domain, https://commons.wikimedia.org/w/index.php?curid=19266062
- Angelo Mosso By Unknown author – Images from the History of Medicine (NLM) , Public Domain, https://commons.wikimedia.org/w/index.php?curid=9942685
- James Mackenzie By Unknown author – , CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=32983432
- Dr. Cesare Lombroso By Unknown author – Reproduced in “Rassenkunde des jüdischen Volkes” by Hans F. K. Günther1929, J.F. Lehmanns Verlag, München. Scanned by MoritzB. , Public Domain, https://commons.wikimedia.org/w/index.php?curid=2770466
- Vittorio Benussi By Massimo006 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=55233055
- Dr. William Moulton Marston By Unknown author – Life, November 21, 1938 edition, page 65, Public Domain, https://commons.wikimedia.org/w/index.php?curid=68979758
- John A. Larson By unknown – Original publication: The Lie Detectors by Ken AlderImmediate source: scanned from book, Fair use, https://en.wikipedia.org/w/index.php?curid=42020149
- Leonarde Keeler By Agence de presse Meurisse – Bibliothèque nationale de France, Public Domain, https://commons.wikimedia.org/w/index.php?curid=18625190