How Lie Detectors Spot Lies

Polygraph examinations and their relationship with LGBTQIA

Hello, people and Welcome back to Keefe Private Investigations, here, we bring you the best content you cannot just get elsewhere. I’m Makayla and today, a polygraph examiner in Oklahoma explains how and why lie detector tests work to detect dishonest words. You do not want to miss out.  Remember that for the best private investigation and polygraph examination services in Oklahoma which you cannot get elsewhere, call Keefe at (405) 435-8355 and you will be glad you did.

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Introduction to the case

Lie detector tests have become rampant over the years, it has also gained lots of controversies. Many people question whether it is accurate and works effectively. The reason is that so many people have lied while the lie detector test was conducted on them, and the test did not uncover their dishonesty and deceit. A polygraph examiner who has been administering lie detector tests for years will be sharing how they work shortly and their effectiveness”

What is a Lie Detector Test?

A lie detector test is a scientific instrument that measures physiological responses in the body, such as heart rate, blood pressure, and skin conductivity, to detect changes that occur when a person is dishonest. A polygraph examiner in Oklahoma City who is trained to conduct these lie detection tests is the one who administers these tests. The polygraph examiner in Del City conducts an effective test by asking a series of relevant and irrelevant questions to help detect the honesty or dishonesty of the person the test is being administered on.”

How Do Lie Detector Tests Work?

As a polygraph examiner in Altus, Oklahoma clients often wonder how these lie detector tests work, which is pretty straightforward. The rationale behind these lie detector tests and based on how it is programmed is that when a person is being untruthful when a lie detector test is being administered, their body will experience a stress response, which triggers physiological changes. The polygraph machine is trained to pick up these changes in the human body which will show that the individual is lying. The polygraph machine measures things like increased heart rate in a person who is dishing. It also picks up increased blood pressure when an individual is lying. A person who is lying tends to sweat when they are lying because of their skin conductivity and the polygraph machine will pick it up. The respiration rate of an individual who is lying also changes. So, all these are measured by the polygraph machine and the polygraph examiner in Midwest City can detect when a person is lying

Why Do Lie Detector Tests Detect Dishonesty?

The question most people seek to understand is why the lie detector tests detect dishonesty and why the lie detector tests are effective because when a person is lying or untruthful they start stressing out and being anxious because they do not want their lie to be discovered. On the other hand, when a person is being truthful, they have a calm disposition, and their psychological responses will be stable and not fluctuate. So, a polygraph machine can pick up psychological changes in a person, so when they are stressed and anxious when they lie, the lie detector tests can pick that up easily

The Science Behind Lie Detector Tests

Lie detector tests are backed up by science because it has roots in physiology and psychology. The polygraph machines used to detect lies measure the involuntary and uncontrollable response of the body’s autonomic nervous system (ANS) the ANS  is responsible for the fight-or-flight response, which is triggered when a person perceives a threat or stress or they are anxious which happens when a person is lying. This is why polygraph examiners can detect when a person is being dishonest


Lie detector tests have been used in employment screening, criminal investigations, and other scenarios to help know if a person is dishonest. Knowing how it works, and why it is used will help polygraph examiners and individuals know how to use it effectively. At Keefe Private Investigations, we see how important it is for the criminal justice system to take its time in carrying out thorough investigations, ensure that justice is served well, get polygraph examinations done, and the need for unparalleled legal services. For more insights about our services, visit us at or Like, share, and subscribe for more informative content. Until next time, please stay alert and if you see a story you want us to feature, send us a message”


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