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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.
What else can I help you with?
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?
Finding information on lie detectors is easy. A police station can give you information on lie detectors. There are now lie detectors for cell phone applications. However, using the applications on phone is not a good source of proof to tell if someone is lying or not.
What year were smoke detectors invented?
Smoke detectors were invented in the year 1967. :P
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 is used by employers to make sure you were telling the truth on your resume?
lie detectors
What church raised millions selling members electropsychometer lie detectors?
Dayy
Where was the lie invented?
Which lie?
Did the ship titanic have any smoke detectors?
No. They were not invented yet.
Did NASA invent smoke detectors?
No, NASA did not invent smoke detectors. Smoke detectors were actually invented by George Andrew Darby in 1902. NASA has, however, improved smoke detectors for use in spacecraft and space stations.
What are the principle of operation of lie detector?
Lie detectors, or polygraph machines as they're more officially known, are large contraptions that are filled with buttons, levers, paper, and measuring devices. They have been used for years in law enforcement to detect whether or not someone is actually lying to officials. The reason why people would lie to law enforcement officials is obvious - they committed a crime that they don't want to get caught for. Lie detectors can help solve this problem by asking a person who's strapped to a lie detector several questions and then analyzing the results. However, lie detectors still aren't permissible in court. This means that should a person fail a lie detector, they will not be able to be proven as lying in a court of law. And likewise, a person will not be able to use the results of a lie detector test to prove that they are telling the truth. This is because lie detectors can't actually detect if a person is lying. They can only tell if the person is displaying deceptive behaviour.
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.
