How to pass the polygraph test

The lie detector test or lie detector test aims to analyze the physiological response to the question to determine whether the subject is true or not. The accuracy of the test has been widely questioned by groups including the National Academy of Sciences, the Office of Technology Assessment of the US Congress and the American Psychological Association. However, this test is often used to screen job seekers and interrogate criminal suspects.

Although a person may be asked to answer all questions honestly, the test aims to measure the response to "white lies", which means that truly honest people are at risk of false positives in the test. Others may want to hide the answers to some questions, whether they are wrong or not. Fortunately for them, it is not difficult to pass the polygraph test. The first step to pass the test is to understand how it works.

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The working principle of polygraph test

The polygraph test includes more than just the time required to connect the polygraph. When a person enters the test center, the tester will start to observe. Skilled polygraph will notice and record nonverbal clues related to lying, so it's a good idea to know your "telling".

The polygraph records respiratory rate, blood pressure, pulse and perspiration. More complex machines include magnetic resonance imaging (MRI) of the brain. Compare physiological responses to irrelevant, diagnostic and related questions to identify lies. The question can be repeated two or three times. Subjects may be asked to deliberately lie to help inspectors establish baseline values. The test usually takes one to three hours to complete, including background assessment, medical history, test instructions, actual polygraph and follow-up.

Most of the suggestions are not very effective.

The Internet is full of suggestions on how to pass the polygraph test, but many of them are not very effective. For example, biting your tongue or nailing your shoes will affect your blood pressure by using pain, and it will not affect the degree of sweating. Similarly, it is not feasible to imagine a lie when telling the truth and the truth when lying, because this establishes the difference between a lie and the truth. Remember, the difference between true and false is the basis of the exam!

Two ways to overcome the test

Basically, there are two good ways to pass the test:

No matter what I ask you, you should be completely in meditation. Note: this is beyond the grasp of ordinary people.

I was depressed during the whole test.

7 kinds of trying skills

Most people feel nervous when they take a polygraph test, whether they intentionally lie or not. Physiological reactions to nerves may not fool the polygraph. You need to improve your game to simulate the feeling of deadly terror. This is because passing the test is a psychological game, which will naturally affect the physical reaction. Here are some tips to try:

If you want to pass the exam, the best way is to stay depressed, scared and confused throughout the exam. Despite the inner confusion, the goal is to show calmness and control. Remember your worst experience, or solve a math problem in your mind-anything that keeps you excited and stressed. If you are worried about a specific question, please imagine that every question is this question before you answer it.

Please take some time before answering any questions. Mark it as irrelevant, relevant or diagnostic (control). Irrelevant questions include asking you to confirm your name or whether the light in the room is on. Related issues are very important. An example is, "Do you know anything about crime?" Diagnostic questions are questions that most people should answer "yes" but are likely to lie. Examples include, "Have you ever taken anything from your workplace?" Or "Did you lie to get out of trouble?"

Change your breathing while controlling the question, but return to normal breathing before answering the next question. You can do small enrollment here, or you can not do it. You can choose.

When answering questions, you should answer firmly, without hesitation or humor. Cooperate, but don't joke or be too friendly.

Try to answer "yes" or "no". No answers, no details, no explanations. If asked to expand a question, please answer: "What else do you want me to say?" Or "There's really nothing to say."

If you are accused of lying, please don't be fooled. If so, use blame as fuel to feel uneasy and confused. In fact, answering the diagnosis questions honestly may bring contradictory results to the examiner, so be prepared to accept further questions.

Practice any countermeasures before the exam. Let others ask you possible questions. Pay attention to your breathing and your reaction to different types of problems.

Remember, applying these skills may invalidate your test, but it won't be of much use if you want to find a job through a lie detector. In most cases, the easiest way to pass a polygraph test is to approach it honestly.

Drugs that affect the test

Drugs and medical conditions may affect the polygraph test, which usually leads to uncertain results. For this reason, drug tests and screening questionnaires are usually conducted before polygraph tests. Drugs that affect heart rate and blood pressure will affect the results of polygraph. These include antihypertensive drugs and anti-anxiety drugs, as well as many illegal drugs, including * * *, marijuana, cocaine and methamphetamine. Caffeine, nicotine, anti-allergic drugs, sleep AIDS and cough drugs may also affect the test.

Some medical conditions may prohibit testing.

Although patients diagnosed as antisocial and psychotic may be excluded from the test because of their potential ability to control their reactions, other medical conditions may prohibit the test. People suffering from epilepsy, nerve injury (including primary tremor), heart disease, stroke or extreme fatigue should not take the exam. People with mental retardation should not take the exam. Pregnant women are usually exempt from testing unless they get written approval from a doctor.

Except for mental illness, drugs and medical conditions may not make people pass the polygraph test. However, they do distort the results and make them less reliable.

source

Committee on Behavioral, Cognitive and Sensory Science and Education and National Statistical Committee (2003). Polygraph and polygraph. National Research Council (Chapter 8: Conclusions and Recommendations), page 2 1.

Scientific validity of polygraph test: research review and evaluation. Washington, D.C.: Office of Technology Assessment of the United States Congress. 1983.