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There were many early attempts to build a lie detector, but in the end, scientists don't really believe they work well enough to be trusted.
- In 1885 Cesare Lombroso developed a machine used to measure changes in blood pressure for police cases.
- In 1904 a device by Vittorio Benussi was used to measure breathing.
- Sir James Mackenzie of Scone, Scotland invented an early lie detector or polygraph in the 1900s. His machine "could be used to monitor the cardiovascular responses of his patients by taking their pulse and blood pressure".
- In 1911 a device recording both blood pressure and galvanic skin response was invented by Dr. Reginald A. Larson of the University of California.
- In the 1920s William Marston made a device that used blood pressure and galvanic skin responses.
- In 1936 the Berkeley Psychograph, a blood pressure-pulse-respiration recorder was developed by C. D. Lee.
- In 1945 a device which recorded muscular activity accompanying changes in blood pressure was developed by John E. Reid.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoThe 'lie detector' is also known as the 'Polygraph' ('many writings' because it graphs several factors about the person being tested.) http://answers.encyclopedia.com says "In 1921 an instrument capable of continuously recording blood pressure, respiration, and pulse rate was devised by John Larson. This was followed by the polygraph (1926) of Leonarde Keeler, a refinement of earlier devices."
There's a print for sale on eBay for a "Vintage US PATENT for LIE DETECTOR 1925 Art Print ..." which implies it was invented and patented in 1925. There's 48 million hits in www.patents.com for 'lie detector', but none for 'Leonarde Keeler'......
Wiki User
∙ 16y agothe lie detector was invented on augst 7 1885
Wiki User
∙ 12y agoJohn Filis Watkins he invented thee lie detector and he stuck it up his butt
Wiki User
∙ 14y agoIt was invented by John Larson in 1921.
Wiki User
∙ 14y ago1921
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Why were lie detectors made?
To detect when people lie.
If in whole country lie detectors are kept What would happen?
All will tell lie.
Where can one find more information about lie detectors?
More information about lie detectors can be found from reputable sources such as government websites, academic research papers, and psychology publications. Some organizations, such as the American Psychological Association or the American Polygraph Association, may provide information and resources about lie detectors and their use. Additionally, books and articles written by experts in the field can offer in-depth knowledge on the topic.
What year were smoke detectors invented?
Smoke detectors were invented in the year 1967. :P
Who invented smoke detectors?
king man
What is a lie detector used for?
Lie detectors are used in law and legal issues to try to determine if someone is telling the truth or not.
What church raised millions selling members electropsychometer lie detectors?
Dayy
What is used by employers to make sure you were telling the truth on your resume?
lie detectors
Where was the lie invented?
Which lie?
Did the ship titanic have any smoke detectors?
No. They were not invented yet.
Why were smoke detectors invented?
To warn and protect people against fires.
Who invented motion detectors?
The first motion detector was invented by Russian Leon Theremin in the year 1920, but the first motion detectors used as a security device were developed in early 1950's by Samuel Bagno. The basis of these first detectors was the Doppler effect and ultrasonic waves application.
