The principle of the lie detector
The lie detector, or polygraph - a device for carrying out psychophysiological research by synchronous recording of vital parameters: heart rate, respiration and electrical skin resistance and bursts of activity in specific brain regions.
The results generalized and indicators was further used to determine the reliability of the obtained during the interview information.
The history of the polygraph as a tool to determine lie is rooted in antiquity - thousands of years ago, joining together in a social, large and small groups, people began to understand the need to identify the perpetrators of a particular offense a crime.
For example, in China the person who was indicted, his mouth filled with rice, and after conviction he spit it back: if the rice was dry, it was believed that the man is guilty, because the fear of exposing the person stops salivation.
Interesting way of defining the reliability of information was practiced in Ancient and Medieval India: there the accused had to answer any the first who came to mind with the word questions about the details of the crime that he informed the Prosecutor, and thus strike the Gong. Usually the response to a critical word was accompanied by a more severe blow to the Gong.
Today, the polygraph device is very common, but often is exposed to criticism by scientists and psychologists who questioned the fact that the polygraph collects "at least 95% accurate information".
Ways to cheat the polygraph
That "is" the absolute infallibility of the polygraph is a great tool in the hands of the chiefs and government structures, which, in fact, allows you to win even before the battle started, making possible interrogation to suppress any desire to deceive or hide information.
In fact, there are many ways of cheating such devices, and the American soldiers and NATO troops, there is even a special program - "Resistance to Interrogation" (Rus. Resistance to interrogation), during which soldiers are taught the ways of deception lie detectors.
There are a number of people that will be much easier to cheat them. These include: social psychopaths (for them there are very different rules - their heart is not eknet when your eknet), pathological liars and good actors.
The first step towards cheating the polygraph will be the realization that he is only a device, the machine. You need to overcome a "reverent" fear of the lie detector and before the operator of a polygraph.
First, the most common method is the use of beta-blockers that hide the change in your vital signs. On the palm (joined sensors of sweating) is usually applied different ointments based on salicylic acid or other substances that prevent sweating.
The second method is totally unrelated to the application of some chemistry, but is associated with the use of other "substances". So, on the eve of a polygraph test can be drunk in the morning blunted emotional state are not adequately analyze the issues and therefore will not cause a reaction. In addition to the alcohol also helps a prolonged lack of sleep also interferes with the operation of the CNS.
If alcohol, beta-blockers or lack of sleep sometimes can be seen with the naked eye, the third method is not defined when passing a polygraph by any means. The method consists in the complete suppression of their emotions through deconcentration and looped attention on a single object (a glass, a picture on the wall, lamp). Neutral voice, response before a given issue and the missing, directed into the void look - here are the basic signs of the use of this method.
Advice 2: How to pass a polygraph
Situations when you need to pass a polygraph, not so much. For example, it is used by some companies to check new employees upon hiring. The polygraph is also used in criminal proceedings. The passage of the polygraph can cause great anxiety even for those who have nothing to hide. This procedure is necessary to prepare in advance.
What is a polygraph and what you want
If passing the polygraph depends on the further development of the judicial process or your employment, you will surely want to know what this procedure is. Of information on this subject quite a lot today, you can read about it in books and on specialized Internet-resources. The main thing you need to know is that the polygraph does not yield accurate results. The effectiveness of such studies is growing, but incorrect results are still.
The reason of having to complete research on the polygraph may be different. If it is associated with a specific incident, you probably will know what you want. If you get a job, as a rule, specific information you will not wait, the goal is to understand your propensity to those or other actions related to the upcoming work.
To significantly increase the successful completion of the procedure, it is possible to work out in advance, but it should be done correctly. There are many methods of testing on a polygraph, as well as control tests to them, you can find them on the Internet. Carefully read these procedures and practice before the passage of the polygraph.
In the procedure of passing the polygraph there are many subtleties. Get as much information as possible about it before getting tested.
On the day of passing of the polygraph dress more conservatively, try to impress those who will carry out the testing. Arriving at the place of testing, be confident, and remember that it is possible, for you will observe, before connect to the equipment. This can be a hidden camera, and also the people who will conduct the testing.
Excessive sweating can be regarded as an indicator of lying. To avoid using deodorant the day before and the day of testing.
Types of questions
In the process of passing a polygraph, as a rule, you specify three types of questions. First, ask neutral questions, the answers to which are obvious, for example, "what is your name?" or "How old are you?". Then there are major issues directly affecting test, for example: "have You ever sold drugs?" or "have You ever stolen in the workplace?". At the end of the test ask test questions, they need to compare your responses with responses to the main questions. To security questions, as a rule, given to monosyllabic answers "Yes" or "No", but to answer them honestly very nice and comfortable. Test questions will depend on your previous answers. For example, if one of the previous questions you will answer what they stole, a control question might be: "do you steal now?"
Try to always answer "Yes" or "No"
For most questions one-word answer is enough. Never make excuses or try to explain what you mean. You can provoke a detailed response. Do not give in to this, if the question did not imply. Answer questions calmly and politely, but do not give more information than is really necessary.
Keep calm and answer clearly
In the first half of the test you need to preserve maximum calm, try to keep breathing at the rate of 20-30 breaths a minute, take deep breaths. Keep calm on the test questions will be harder, but try to do it as necessary. Passing the polygraph is a serious procedure, do not attempt to joke or cheat, the answer is seriously, clearly and without hesitation.