The Pros And Cons Of Polygraph Testing

Polygraph Testing is also known as the lie detector test. Some people believe that it can actually detect lies and others don’t. Polygraph test measures your heart rate, blood pressure, and breathing. The polygraph examiners assume that when a sudden increase in one of those sections that you are lying. If you stay calm then they assume you're telling the truth. Many things can change a sudden increase such as emotions or medical conditions. I feel that it is unethical to assume that someone is lying because of an increase in their HR, BP, or breathing. An attempt of murder case needed a polygraph test because they did not have any really good evidence or witnesses. The polygraph examiner started to question the suspect as the first question was asked “the needle recorded a violent fluctuation indicating a change in Breathing, BP, or HR. They asked the suspect another question and he answered then everything went back to normal. When their pulse goes up that indicates that they are lying. Also, could be caused by another reason that the polygraph examiner may or may not know. A polygraph test cannot be used as evidence. A polygraph is just as if fingerprint was found but wasn’t the suspect. “The lie detector test hadn’t gained approval from the scientific community and is inadmissible in court”. If you confess during a …show more content…
The Scientific community has questioned the reliability multiple times. U.S. Supreme Court has ruled that the local courts can ban polygraph tests as evidence. Polygraphs have to types of questions relevant questions and broad/control questions. Doug Williams used a few different techniques with people to teach them to stay calm. After that Doug was charged with witness tampering he was sentenced to eight months in prison. If the reliability of polygraph testing has been questioned by a scientist than it should be considered because it is so called