Specific Purpose: To persuade the audience that lie detector tests are unreliable.
Thesis Statement: Lie detector tests are very unreliable. .
Organizational Pattern: Topical.
Introduction Device: Illustration .
Conclusion Device: Summary.
Approximate Delivery Time: 3:00.
Introduction: Your best friend is dead. You were the last person their house and you are now the prime suspect. You didn't commit the crime. They take you into custody and you are forced to take a test. As with any test, while you are taking it, you are extremely nervous. You stumble on some of the answers. The test concludes that you were the murderer and you are sent to jail. What horrible test can this be? It is simply a lie detector test. Lie detector tests are very unreliable. .
Thesis Statement: Lie detector tests are very unreliable.
I. Background information.
A. Polygraph test.
1. Lie detector test is also called the polygraph test.
2. Originally was designed for use in criminal cases.
A. The essentials of the lie detector test.
1. Monitors a person's physiological reactions when asked a question.
2. Consists of combination of medical devices used to monitor change in the body.
3. A person is attached to the machine and is then asked questions.
4. The examiner looks for several things.
a. Change in heart rate.
b. Change in blood pressure.
c. Change in respiratory patterns.
d. Change in sweatiness.
I. Lie detection and the theory behind it is barely developed.
A. A lie detection test cannot go inside one's mind and really determine whether or not the person actually committed the crime.
B. A physiological reaction is created upon the test.
1. Based on fear.
2. Detects reaction to when a person is most likely to be dishonest.
A. The lie detector essentially only detects fear and not lies.
I. The lie detector test can be biased.
A. Most experts who defend the lie detector test admit that the results center .
on what the examiner asks the suspect.
B. It also is based on how the examiner interprets the results as well.