can anyone answer thses questions about the polygraph??? Who invented it and are there any interesting facts about it? PLEASE HELP!!!! i have a report due 2morro and i dont know anything about the polygraph!!!!
2006-09-17 11:49:24 · 8 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Oh yeah, i forgot, i need to get info about the inventor of the polygraph, John A. Larson, i tried google and i cant find anything.
2006-09-17 11:52:04 · update #1
A polygraph (commonly and inaccurately referred to as a "lie detector") is a device which measures and records several physiological variables such as blood pressure, heart rate, respiration and skin conductivity while a series of questions are being asked, in an attempt to detect lies. The above measurements are posited to be indicators of anxiety that accompanies the telling of lies. Thus, measured anxiety is equated with telling untruths. However, if the subject exhibits anxiety for other reasons, a measured response can result in unreliable conclusions.
A polygraph test is also known as a psychophysiological detection of deception (PDD) examination. The original polygraph was invented by John A. Larson.
Today, polygraph examiners use two types of instrumentation, analog and computerized. In the United States, most examiners now used computerized instrumentation.
2006-09-17 11:51:37 · answer #1 · answered by Melanie L 6 · 0⤊ 0⤋
There's two ways to beat a polygraph. One- Keep your heartbeat, sweating level, pupil dilation, etc perfectly steady during the entire test. And if the polygraph machine is under like 25 years old, thats just about impossible to do, because they can measure you down to almost the last cell. The other way- When you are telling the truth, think of extremely scary and horrifying things. So when they ask you an obvious question (like what is your name), answer truthfully, but get yourself extremely nervous about something. Maybe if you have a sports game coming up or you want to ask a girl on a date, but you're very nervous, think about that. And stay extremely concerned and nervous for every question you answer truthfully, just don't really exaggerate it. Thus, you can lie when asked a question you want to lie about, and the end results will make no sense, as you responded the same way when they asked you your name. If someone stays consistently nervous and concerned during the test, they'll see that they freaked out when asked simply what their name was. And when a hard question is asked (e.g., did you steal that man's car?), they can lie and they will once again, get nervous. That will make the results inconclusive, as the ploygraph machine will say that you were either lying about your name (which makes no sense), or you were telling the truth when you really weren't and you were just nervous about taking a lie detector test. This is as you stayed consistently nervous on all question, not just the questions meant to reveal something.
2016-03-27 06:21:08 · answer #2 · answered by ? 4 · 0⤊ 0⤋
I didn't find a lot about the man himself, but you can contact the University of Berkly CA for his papers.
Polygraph: http://en.wikipedia.org/wiki/Polygrap
How to Cheat a Polograph: http://www.wikihow.com/Cheat-a-Polygraph-Test-%28Lie-Detector%29
How Poloygraphs work: http://people.howstuffworks.com/lie-detector.htm
Indiana Polygraph Assoc.: http://www.indianapolygraphassociation.com/facts.html
Polygraph is psuedoscience: http://www.antipolygraph.org/
UK-Skeptics: http://www.skeptics.org.uk/article.php?dir=articles&article=polygraph_or_lie_detector.php
John A. Larson (in his own words): http://www.northstar.k12.ak.us/schools/ryn/projects/inventors/larson/larson.html
John A. Larson's book: http://www.addall.com/detail/0875850782.html
Manbir Online: http://manbir-online.com/topics/lie-detector.htm
"The first modern "lie detector" - Polygraph test was developed by John A. Larson, a medical student at the University of California in the USA, in collaboration with a police officer. It is called a polygraph because it is capable of recording blood pressure, pulse and respiration continuously and simultaneously.
The police first used the polygraph as an interrogation device in 1924.
It is considered that physiological phenomenon such as blood pressure, pulse and respiration are affected by a person's emotional condition. These phenomenon are not generally under voluntary control.
A pneumograph tube is fastened around the subject's chest. A blood pressure cuff is strapped around his arm. The operator puts questions to the the subject, changes in the physiological phenomenon are recorded on a moving graph paper as in an ECG machine. A long questionnaire is prepared in which loaded questions are mingled with a large number of innocuous questions.
Experts then analyze the data and correlate the subject's response to specific questions. Then the experts decide on which questions the subject had lied and where he was truthful.
Though in use for almost for 80 years, the polygraph test's reliability is not accepted universally. The results are not always judicially acceptable."
2006-09-17 12:30:08 · answer #3 · answered by Dan S 7 · 0⤊ 0⤋
Invented by John A. Larson. More information here: http://en.wikipedia.org/wiki/Polygraph
2006-09-17 11:51:59 · answer #4 · answered by tobias382 1 · 0⤊ 0⤋
try Google.
2006-09-17 11:50:23 · answer #5 · answered by couture♥girl 3 · 0⤊ 0⤋
http://skepdic.com/polygrap.html
2006-09-17 11:52:02 · answer #6 · answered by i_luv_ashley t_miley c_vanessa h 2 · 0⤊ 0⤋
you are lazy
2006-09-17 11:50:46 · answer #7 · answered by predatorpio 3 · 1⤊ 0⤋
dont be lazy....
2006-09-17 12:00:40 · answer #8 · answered by lostluver14 2 · 0⤊ 0⤋