0
Polygraphs
A polygraph, or lie detector, is a machine that measures certain types of bio data, such as a person's heart rate, during a series of questioning. The results of this data is believed to reflect the person's measure of honesty while giving their answers.
256 Questions
Is a polygraph test inadmissible in court?
Although they can be used in conducting criminal investigaions, the results of polygraphs cannot normally be entered into evidence in court as other types of "evidence" might be.
1980 - United States v. Roberts
The prosecutor had told the grand jury unequivocally that polygraph results were inadmissible in a court of law and the court called her on the carpet and stated that her statememnt was false and said "The Court dissapproves of the prosecutor's bold statement to the Grand Jury that polygraph evidence is inadmissible at trial. Such statements are absolutely untrue. The Ninth Circuit has held that polygraph evidence is admissible within the trial court's discretion."
As current law stands it is up to the trial judge as to how he or she will handle any motion to admit polygraph evidence.
However Legally in all 50 States of the US you can refuse to submit to a polygraph test and the fact that you refused the test can't be used against youin a court of law..But if you take the test it could be used against you if the trial judge decides to allow it.
If a grand jury is reviewing the evidence to see if sufficient data exists to proceed with a trial they can use the results of a polygraph test in their recommendation to no-bill or indict. In my experience the accused should always appear before the grand jury and/or take a polygraph. Passing a polygraph will almost always get a no-bill. Failing it or failing to take one will usually result in an indictment.
Where can you get a lie detector test?
You don't need to spend lots of money just to buy a lie detector machine. From the start all you have to do is what the doctor uses, blood pressure. If you use this and someone is lying or hiding things you will know the way blood pressure react. Try it and you'll see. Good luck
How is the lie detector test relevant?
Lie detectors are now considered an outdated and ineffective way of determining guilt or innocence; they can be easily beaten or dodged by someone with a few minutes' training and some practise.
How do you build a lie detector?
Most lie detectors are based on detecting the activation of the autonomous nervous system when lying. Such effect are increased sweating and elevated blood pressure.
A blood pressure meter could thus be used as a primitive lie detector. This method would however require information on changes in person's blood pressure while lying and would still be prone to confounding factors such as stress.
Does the spy-net video watch have a lie detector?
yes it does, but i still don't know how to operate it appropiately. i just got this watch yesterday.
How do you cheat a polygraph test?
Hold your breath between questions. A polygraph measures and detects your heart rate meaning if you lie or nervous your heart rate will beat faster. Holding your breath will slow your heart rate.
Will Viagra help pass polygraph?
Viagra is a medication primarily used to treat erectile dysfunction and does not have any direct effect on polygraph results. A polygraph measures physiological responses such as heart rate, blood pressure, and respiration, which can be influenced by anxiety or stress rather than the medication itself. While some may believe Viagra could alleviate anxiety related to sexual performance, it won't specifically help in passing a polygraph test. Ultimately, the best way to pass a polygraph is to answer truthfully.
What do you call a lie detector?
AHH a lie detector ANSWER by Engl1sh: A perfessional typically uses the term 'polygraph' test.
Look up books online, on the subject.....you CAN beat these machines...they are FAR from perfect...why do you think judges won't allow them into a courtroom???!
Good luck.
One trick that works isYou can also think of something really exiting when they ask your name the color of the wall and any obis questions like that and when they ask the questions you need to lie on it will show your heartbeat as normal.
How much a fidelity polygraph test cost?
A polygraph test test can cost anywhere from $400.00 to 600.00 that would be according to what state or country you live in.
How does one relax enough to pass a polygraph exam?
A polygraph exam is something that cannot be cheated. No matter how relaxed one is, there are still slight variations in heartbeat.
How much does a polygraph test cost?
they cost around £500-1500 but be careful there has been scientific evidence suggesting that at best there only 87% correct and possibly only 50% ie you'd be as good tossing a coin. a good body language book would help if you study it well apparantly body language rarely fails.
When were lie detectors invented?
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.
Who invented the first polygraph machine?
A machine used by law enforcement to detect when a person lied was first designed created and developed by Dr. John Augustus Larson in 1921. Larson's machine was developed to detect changes in the blood pressure, skin temperature, and breathing rate of the person being tested. This device was first used by the Berkeley Police Department.
Larson's invention was later improved and perfected by his "apprentice", Leonarde Keeler. Keeler would go on to change to an ink recording system, create something less bulky and cumbersome, and an indicator to show when the question was asked. Keeler began his improvements in the early 1920's and continued them for quite some time.
I believe John Larson invented it in 1921.
James witword
Are lie detector tests admissible in Louisiana courts?
No. Although lie detectors seem credible, they can be often faked to produce response opposite to what you want. The lie detectors lack the hard evidence that normal court order can provide (such as blood stain, DNA analysis, etc) and relies solely on how stressed the person is. Even when you didn't commit the crime, extremely high level of stress can tick the lie detector. Similarly, even when you did commit the crime, low level of stress can fool the lie detector.
Some people say that lie detectors have a 99% chance of succeeding. It is that 1% that makes the people say "No, we don't want it."
Why is a polygraph not an exact tool for testing the sincerity and honesty of a subject?
Polygraph is used to determine intentional deception regarding a very specific issue. It is not used to determine general honesty, sincerity or integrity. Part of what makes polygraph testing work is "fear of detection" by a person trying to conceal involvement in or knowledge of a specific event. This fear of detection triggers a reaction in the sympathetic nervous system (SNS) which polygraph examiners are trained to identify. The frequency, location and intensity of these reactions in a polygraph exam are used to develop a numerical score, and this score is used to determine the probability of deception. The more specific the questions, the more reliable the results will be. You can not ask someone "Are you an honest person?" because this is subjective to the point of view of the person taking the test. - Michael Martin (President, Global Polygraph Network)
Can the truth show as a lie on a polygraph?
A polygraphy doesn't actually say "truth" or "lie".. it records vital signs, and the assessor makes a determination based on the results of the vital sign readings vs. typical human bodily reactions to telling lies. It's not a guaranteed method by any means, and that's why polygraphy results aren't eligible to be submitted as evidence in court.
What are the advantage and disadvantages of polygraph machine?
advantage: you come to know who is lying
disadvantage: the principle is based on the human skin resistance, is the person who is subjected to the test is lying confidently then it will be difficult for the lie detector circuit to catch a lie because in this case you wont be sweating or feeling nervous
Is it possible to fail a polygraph test?
Yes and no. If your lying about a murder you can but if your lying about what color socks your whereing you cant.
Where can you take a lie detector test?
ANSWER:
The only way for you to find a place are police department, government or federal building, but if you want to know if a person is lying to you, common sense, go to a drug store where they have a machine that get a pulse of your heart. All you need is let that person put his or her hand in the machine then ask a question and you will see the machine beating faster if the person is lying, beating normal is the person is not. It takes a dollar to do them.
