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Lie Detector. there are various types- the Stoelting and Keeler are best known.
They came out in California in the twenties. Larson was the inventor, his protege being a man named Stoelting, who went on to commercially market the device and they ( Stoelting brand) are very much in business today.
parts of a polygraph machine
Derek Stoelting is 5' 10".
Laurie W. Stoelting has written: 'Light on the Mountain /Selections'
Polygraph examiner
The polygraph test is not "proof-positive". The polygraph test is not completely unreliable.
AHH a lie detector ANSWER by Engl1sh: A perfessional typically uses the term 'polygraph' test.
The polygraph is commonly used during criminal investigations to determine whether a suspect is telling the truth.
A lie detector picks up changes in your pulse and heart rate. Generally when you tell a lie, your pulse will increase because you don't want to tell the person what you are hiding and consequently become nervous. It has been confirmed that a lie detector can not be trusted fully to determine whether you are lying or not.
American Polygraph Association was created in 1966.
The full scope Polygraph is any typical polygraph but it includes lifestyle questions. E.G. Have you ever had sexual relations with underage children?