The examiner will ask you for your side of the story. The more information he has, the better the result. There are always two sides to every story.
The next step in the process is to point out the different components of the polygraph and explain what they do. The polygraph consists of two pneunographs, convoluted tubes that are placed around the chest and the abdomen and measure respiratory cycles.
A blood pressure cuff is placed on the subjects arm and is inflated during the examination. It show differences in blood pressure and heartrate.
Two electrodes are attached to the palm of the hand using gel pads. These measure Galvanic skin response (GSR) often called electro dermal activity (EDA). The simple explanation is that they measure sweat gland activity.
In some cases a plethysmograph is placed on the finger and measures blood flow.
Finally the examiner will explain how the polygraph works.
Scarborough is the most easterly district in the City of Toronto. It is the most culturally diverse area of the city. One of its attractions is the wide array of ethnic restaurants that result from this diversity. Other attractions include, the Scarborough bluffs, Toronto Zoo, Guildwood village, the Rouge National Urban Park and Scarborough College part of the University of Toronto. Our examiner graduated from this college and holds a degree in the social sciences.
David Robbins was recently asked why does the polygraph take two hours or more when you are only asking three questions.
The polygraph is composed of three separate parts. The pre-test,where the subject is prepared for the test. The test itself and the post test.
About half of the time is taken during the pre-test.
First the person’s rights are explained and he is asked to sign a consent form.
The examiner will then assess the person’s suitability to undergo polygraph testing. First he will be asked questions about the state of his health and prescription drugs that he is currently taking. This to determine if there is anything that would prevent him from taking the test, or that might affect the exam in some way. Mental health issues and injuries or disabilities that would prevent proper placement of the components would be examples where the person could not be tested. Things like a cold, where someone is constantly coughing or sneezing would prevent the person from being examined in the short term. The examiner will want to be aware of other issues that although they would not prevent testing might have an effect on the collection of physiological data. Examples would be moderate alcohol or drug use, lack of sleep, high or low blood pressure. The examiner will talk about other things as well. He wants to ensure that you are communicating well.
