Skip to content
Home » What Is a Lie Detector Test?

What Is a Lie Detector Test?

Polygraph testing is utilized by a variety of businesses. Knowing when and where to apply polygraphs is an absolute necessity for any business seeking solutions.

People are always lying and police officers have been aware for quite a while when someone lies and reveal it, they usually do so in some manner. If they are dishonest, certain individuals avoid eye contact, while others flutter while others begin to sweat. Polygraph tests are based on this idea and develop a tangible method to record people’s responses to the questions. Polygraphs test blood pressure, respiration and heart rate as well as conductivity of the skin while the subject is asked questions. Through comparing the body’s responses when asked specific questions examiners of polygraphs can confirm the accuracy of what the subject is speaking.

Use cases for polygraph testing

There are several instances where polygraph testing can be utilized:

In civil and criminal cases. In certain cases involving civil litigation or criminal trials there is no hard evidence always readily available or sufficient.

Polygraph tests are sometimes employed to strengthen evidence or verify the credibility of witnesses. In several states the polygraph examiners are permitted to be a witness in both criminal or civil trials. Police frequently use the polygraph to investigate cases all over the world, but under the law, no one is required to test the polygraph. The law states that refusing of taking the exam will not alter the outcome of a case.

Pre-employment screening. The government agencies that hire workers for jobs that require sensitivity will typically utilize polygraph screening to choose applicants.

For questions related to homeland security. For homeland security issues. Central Intelligence Agency, Federal Bureau of Investigation, National Security Agency and other federal agencies responsible for the security of our nation regularly employ polygraphs to detect criminals and threats to the nation.

For investigations into commercial theft. Companies concerned about fraud and employee theft could consider using the polygraph to assess the honesty of employees and their loyalty towards the company.

In order to monitor sexual offenders. In several states, it’s mandatory for sexual offenders to be tested with a polygraph prior to being eligible to be paroled or put on probation. In some instances tests are also utilized to check on the sex offenders. Since offenders often repeat their crimes without having to disclose the incident for a while the polygraph test is considered as one method of determining whether a criminal is treated well or not.

For more information visit

Banks. Since bank employees typically are accountable for or have access to huge quantities of cash and other valuables, testing with a polygraph can be used to verify the honesty of employees as well as for internal investigation.

What is a lie detector test?

The lie detection test can also be called the polygraph test. The aim of the test is to determine if there’s a deceit within an individual. It is designed to find out whether or not someone is lying. The polygraph is a device that monitors an individual’s physical reaction to a set of questions that are structured. Examiners examine the changes that occur in a person’s response to questions to decide on whether an person is lying. Polygraph tests are utilized to determine three primary motives for investigations which are incident-specific (such for a crime investigation) or employee screenings as well as pre-employment screeners.

How Does It How Does It

The polygraph is a device that is equipped with sensors that are connected to the person testing. The sensors vary in size between four and six according to the type of device. They typically track the rate at which a person breathes and heart rate (heart rate) and blood pressure and sweat. The analysis of these areas is known as physiological reactions. Breathing rate is usually determined by a pneumograph an instrument that is placed around the chest of a patient which measures the frequency and strength of the person’s breathing. Blood pressure and heart rate can be measured through the application of an cuff for blood pressure. To measure the amount of sweat or the electrodermal response electrodes are attached to a fingertip of a person. The electrodes are disposable or small plates of metal.

In the beginning, the data that was gathered during the polygraph test was recorded with analog instruments. The information was printed on a moving piece of paper using a variety of pen-like instruments moving to display the information. This is why the records of a person’s responses during the actual test is known as the polygraph chart. The majority of polygraph tests nowadays use computers and recording systems to record the information.