Week 7 first draft narration

My persuasive argument thesis is:

The lie detector is not accurate to use in the court as the evidence.

1. What do people already know about my topic?

Everyone knows distinguishing lie is not easy in the life and most of it is guessing. And we can't feel sure about it. And here is the device that named 'lie detector'. All the people will know the meaning of the lie detector instantly. Also the goal of lie detector. It is to see if the person is telling the truth or lying when answering certain questions as I said in the introduction. 

And people know the evidence in the court plays an important role that can turn the final judgement.

2. What research has already been done about my topic? 

There are two kinds of lie detector-polygraph and FMRI. And I have some information about the principles of polygraph(http://people.howstuffworks.com/lie-detector.htm http://science.howstuffworks.com/question123.htm) and FMRI(http://terms.naver.com/entry.nhn?docId=1968069&cid=42406&categoryId=42406).
Also this three texts have information about differences between the polygraph and FMRI.

And I found some limits of the lie detector.(http://terms.naver.com/entry.nhn?docId=1968069&cid=42406&categoryId=42406 or http://20708hyojeong.blogspot.kr/2014/09/httpterms.html) It can support my argument.

3. What are the implications of my argument (What if I'm right? What if I'm right and people ignore me?)

In the court, the evidence plays important role in the judgement. Also it can turn the final judgement. But If the lie detector be used in the court as the evidence like nowadays, we have to worry about misjudgement of the lie detector. And there will be appear people who have damage from the inaccurate of the lie detector.

My Narration

And here is new information. Do you know that there are two kinds of the lie detector? Maybe no. There are polygraph and FRMI. Also there are differences.

 

Polygraphs are devices that monitor a person's physiological reactions. A polygraph is the devices that are used to monitor changes occurring in the body. When a person is questioned about a certain event or incident, the examiner looks how the person's heart rate, blood pressure, respiratory rate and perspiration(sweatiness) change compare to normal levels.

 

Also, FMRI(Functional Magnetic Resonance Imaging) can distinguish the lie like the polygraph. However there is difference.

FMRI have several ways to detect. First one is using BOLD(blood oxygenation level dependant). This way's point is measure the oxygen amount in the blood of brain. Second one is cognitive subtraction. This process compares the picture of brain that telling lie and telling truth.

 

Both Polygraph and the FMRI are the ways to distinguish the lie, but polygraph record the physiological reactions. And the FMRI record the oxygen amount in the blood of brain and the picture of the brain.