B. Reason to Listen: It can happen that you will have to take a polygraph test one day, so why shouldn't you be prepared to take it?
C. Credibility Statement: I have watched some TV shows where participants have to pass the polygraph test to win the prize, so it is rather interesting whether someone can beat the test and I tried to look for some info
D. Thesis & Preview of Main Points: Firstly, I will describe how a polygraph works. Secondly, I will examine whether polygraph test can be used in jury trials. Thirdly, I will discuss how to beat the polygraph test
2. Statement of the first main point: How the polygraph works
A polygraph is a machine that was invented in 1921 and its main aim was to detect whether the person was lying by measuring physiological indices
The first polygraph measured blood pressure, pulse rate and respiratory rate [polygraphia.ca]
When the person provides deceptive answers, these indices will change, and it will be clear that the person is lying [polygraphexaminer.com]
Transition: However, let's take a look why polygraph tests cannot be used in the jury trials
3. Statement of second main point: Polygraph tests cannot be used in the jury trials
Although polygraph tests are pretty trustworthy, they still cannot be used in jury trials
The reason for that is that it is possible to train yourself to cheat on the polygraph test and skew the results [nolo.com]
Thus, most courts do not use polygraph equipment in the jury trials as polygraph test will not be completely accurate [psychologytoday.com]
Transition: So, let's take a look how one can cheat on the polygraph test
4. Statement of third main point: It is possible to cheat on the polygraph test.
There are many different techniques that can be used to cheat on the polygraph test and beat the machine
The hardest way to cheat is practicing yoga that can help in having the person's pulse under control [nolo.com]
Another way to cheat is to put a nail in the shoe to cause pain and influence the heart rate or use a drug to calibrate it [listverse.com]
5. Conclusion
A. Review of Main Points:
1. First main point: Polygraphs are built in a way that they let the examiners find out whether the examined person is lying by measuring physiological indices
2. Second main point: However, the polygraph test are not 100% accurate, and this is why they are not used in trials
3. Third main point: There are many ways to beat the polygraph and skew the test results
B. Restate Thesis: Thus, polygraph tests are not completely accurate
C. Closure: So, start practicing yoga and get ready for the polygraph test!
.
Works Cited
"Lie Detector and Polygraph Tests: Are They Reliable? | Nolo.com." Nolo.com. Web. 9 July 2015.
"Do Lie Detectors Work?" Psychology Today. Web. 9 July 2015.
"Top 10 Tips for Beating a Lie Detector - Listverse." Listverse. 8 Nov. 2007. Web. 9 July 2015.
"THE POLYGRAPH HISTORY." Polygraph History. Web. 9 July 2015.
"The History and Basic Facts of Polygraph." Web. 9 July 2015.
