The Truth about Lie Detectors

The Truth about Lie Detectors

You have seen it in crime dramas, ads, and even in comedies: the lie detector test is now a popular cultural icon. You see the polygraph pen moving and streaks or lines will start appearing. These lines pertain to how the patient (or the person being interrogated) feels, and whether or not he is telling the truth. According to Leonard Saxe, a psychologist, using the lie detector test and the truth about it may be founded on a myth. He called lie detection a misnomer, because the process involves unstandardized questions.

A lie detector helps you determine whether a person is lying through various physiological signs, such as perspiration, blood pressure, heart rate, and respiration. The depth and rate of respiration is measured, as well as the skin conductivity. During the examination, the person to be interrogated will have to undergo this test, with the instrument attached to his body. The interrogator will ask a couple of questions, some of which are relevant to the crime committed (also called the Control Question Test). These questions are important for the authorities to know how the person feels while recollecting certain events, especially if they are involved in a crime.

It is thought that when a person lies he becomes suddenly agitated or nervous with the questions. Ideally, a person who has been telling the truth should stay calm and relaxed. But Saxe says that a person who is accustomed to lying could act and therefore deceive the instrument and the interrogator. Assuming that he has practiced the interrogation several times and has prepared himself for such scenario, he may not have any trouble answering the questions. Thus, the usual signs of lying may not be present. The accusations may be inconclusive.

A similar test called the Guilty Knowledge Test or GKT may also be conducted. The GKT involves a multiple-choice test wherein the test items are about something the subject would be guilty of. The results are then recorded and the investigators will have a pattern to the subject’s perceptions and feelings. Still, a person who knows a lot about acting and hiding his true self may evade the GKT.

The lie detector test has always been a controversial topic because of one underlying problem: the physiological reactions are subject to deception. Even innocent people may be accused of lying if they feel suddenly scared of the whole process. An honest yet nervous person may be accused as lying because his physiological responses betray his innocence.

How do we test the validity of the lie detector test? First, you have to make sure that your instrument comes from a reputable manufacturer, and a legit institution is using it. Lie Detector Test Ltd is one example of this instrument. With us, you can be sure that you are using a legit instrument for polygraph testing. The instrument may be used for a number of purposes, such as pre-employment testing, investigations of insurance, media and current affairs, family law, crime investigation, resolution of domestic dispute, fraud or theft, and in many other circumstances.

We have been in the business for years and we can assure you that the lie detectors we use are effective in determining the truth on any case. For example, you can hire our services to screen job applicants. Doing so can prevent you from hiring someone with a shady past. The polygraph test can verify such information.
You could also use the test to resolve domestic dispute, especially if you are suspecting your spouse of cheating. Quite a number of media personalities have also been under the test, not for abuse, but for conceding to the requests of fans to answer issues (especially personal matters).

When looking for a polygraph test, make sure that the examiner is legit and trained. A qualified lie detector expert has a license. He should also be a graduate of an accredited polygraph school. An example of this accrediting organization is the American Polygraph Association (APA).
The lie detector expert should also have professional affiliations. It would also be comforting to know if he is a member of other accrediting organizations other than APA. Check the polygraph expert’s educational background, too. Lastly, the expert must use only the best and most modern equipment available. Ask if the expert works in an established institution.
You might think that asking so many questions seems like overkill, but keep in mind that the results of the polygraph test can actually permanently scar personal relationships and change your life. Ergo, the results should be based on sufficient evidence. The person called for the job is someone who is passionate about his work, no matter how uninteresting a polygraph test could sound. The lie detector test and the polygraph expert should work together so that your life won’t be under the mercy of a lie detecting machine.

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