Study: Lie Detectors used in Polygraph Tests are not always Credible - Tribune Byte

-

Study: Lie Detectors used in Polygraph Tests are not always Credible - Tribune Byte

Study: Lie Detectors used in Polygraph Tests are not always Credible - Tribune Byte

Posted: 08 Jun 2019 09:32 PM PDT

A lie detector or otherwise known as a polygraph machine records a person's bodies response to certain questions to detect whether they are telling the truth or not. This includes measuring the person's blood pressure and change in heart rate and sweating.

Many wonder why can't investigation officers just use a lie detector machine and get the case over and done with, quickly and simply.

The question that arises is, that is the result of these tests credible? According to Dr. Sophie Van Der Zee, when a person is lying, they are more stressed. And these machines can detect a person's change in behavior and detect whether or not a person is feeling stressed. In simpler words, the lie detecting machine does not detect whether a person is lying, but it can detect whether or not the person's behavior has changed and if they are showing signs of stress.

This information is then used to asses whether the person is deceiving the investigator or being truthful.

During a polygraph test the person is made to feel comfortable in order to get their stress levels. On a normal level they will first be asked basic questions such as age, name, etc. There will be no surprise questions during the test, as this will raise stress levels and lead to a result that may not be accurate.

Those who can control their stress rates can even cheat the test.

So is it credible?

According to Aldert Vrij:

"It does not measure deception, which is the core problem,"  "The idea is that liars will show increased arousal when answering the key questions, whereas truth tellers will not.

"But there is no sound theory to back this up."

mm

David Rogers

David has worked as a journalist for various print-based magazines for more than 5 years. He is a science and space enthusiast who aims to excel in the field, especially in human anatomical studies. He curates and edits quality news pieces for Tribune Byte in the Science & Education genre.

Comments

Post a Comment

Popular posts from this blog

Best Home Security Cameras 2023 - The Tech Edvocate

-
Image
In recent years, home security has become a major concern for property owners. With advancements in technology, having a reliable home security system is essential for the safety and security of your family and belongings. One such integral component of a modern home security system is the security camera. In this article, we will discuss the best home security cameras available in 2023 to help protect your home and loved ones. 1. Arlo Pro 4 Spotlight Camera: Arlo Pro 4 is a top-of-the-line wireless camera that boasts impressive features such as 2K HDR video quality, color night vision, and two-way audio. The integrated spotlight protects your home during the night by providing sufficient lighting to scare off intruders. With its weather-resistant design, the Arlo Pro 4 can be mounted indoors or outdoors, making it a versatile solution for almost any home. 2. Google Nest Cam IQ Indoor: Google's Nest Cam IQ In...
Read more

CCSO 911 communication officers wanted; starting pay increased - Citrus County Chronicle

-
Image
CCSO 911 communication officers wanted; starting pay increased - Citrus County Chronicle CCSO 911 communication officers wanted; starting pay increased - Citrus County Chronicle Posted: 22 Sep 2020 07:32 AM PDT Tiana Jarrell's eyes scoured a cluster of computer monitors with maps and details on 911 calls. Her hands glided across keyboards, ready to take a sudden phone call for help and relay the emergency to appropriate responders. Jarrell's first shift alone "on the floor" of the Citrus County Sheriff's Office's 911 Communications Center inside the Emergency Operations Center was July 4, 2020. Independence Day seemed somewhat fitting as it marked the end of Jarrell's 700 hours of paid intake training after her hiring in February. Jarrell was drawn into the job because of its parameters, qualification requirements and benefits. "The obvious rewards are helping people, and I t...
Read more

Former Shelton teacher molested teen in woods outside school, warrant says - CTPost

-
Image
David Munson David Munson Photo: Contributed Photo / Contributed Photo Photo: Contributed Photo / Contributed Photo Image 1 of / 1 Caption Close Image 1 of 1 David Munson David Munson Photo: Contributed Photo / Contributed Photo Former Shelton teacher molested teen in woods outside school, warrant says Back to Gallery MILFORD — A one-time teacher of the year award-winner in Shelton allegedly took a teen he was mentoring on walks in the woods outside school and molested the boy, according to a warrant for his arrest. The former educator, 77-year-old David Munson, was arrested last April on charges of first-degree sexual assault and risk of injury to a minor. He has pleaded not guilty to the charges and his lawyer has vowed to take the case to trial. An arrest warrant in the case detailing the charges against Munson, who retired as a teacher in 1999, was made public Wednesday at Superior Court. The sexual assau...
Read more