Van Arsdale Polygraph Services provide polygraph examinations utilizing state of the art computerized equipment.
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4. Who uses polygraph services? 1. What types of issues can be clarified with a polygraph examination?
2 What is a Polygraph? The term "polygraph" literally means "many writings." The name refers to the manner in which selected physiological activities are simultaneously recorded. Polygraph examiners may use conventional instruments, sometimes referred to as analog instruments, or computerized polygraph instruments. It is important to understand what a polygraph examination entails. A polygraph instrument will collect physiological data from at least three systems in the human body. Convoluted rubber tubes that are placed over the examinee's chest and abdominal area will record respiratory activity. Two small metal plates, attached to the fingers, will record sweat gland activity, and a blood pressure cuff, or similar device will record cardiovascular activity. . What happens during a polygraph examination? Once a client has provided the examiner with case facts and scheduled an examination, there are four phases that generally describe what will happen during the examination. During the first phase, the examiner will explain, collect and execute the required forms and waivers. After explaining the polygraph components, instrumentation and testing process. He will discuss the case facts with the examinee and formulate the questions to be used during the examination. The examiner will carefully review each test question with the examinee to insure that the examinee completely understands each question. During the second phase of the examination, the examiner will attach the polygraph components to the examinee and begin to collect data by asking the examinee the reviewed test questions. At least two test question sequences will be collected. It is not unusual to collect four or more test sequences in a polygraph examination. Following data collection, the examiner will analyze the collected data to determine if it is suitable for scoring. If not, additional data may be collected at this point. If the data is suitable for scoring, the examiner will numerically score the data. At the conclusion of the scoring process the examiner will formulate a preliminary opinion that either the data indicates that the examinee is deceptive, not deceptive, or that the data is inconclusive. During the third phase, the examinee is given an opportunity to discuss or explain any observed reactions to relevant questions. The examiner will then render a final opinion. He will then notify the examinee of his findings. During the fourth phase, the examiner will transmit the test results to the client verbally as soon as is practical. A written report will be provided if requested. NOTE: Polygraph exams are conducted in private with no other persons permitted in the examination room during the test (other than possibly an interpreter). NOTE: The average polygraph exam takes from one to three hours to complete. 4. Who uses Polygraph Services? and limitations of the Employee Polygraph Protection Act of 1988 (EPPA)
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