Psychological Profiling In The Polygraph Test

Psychological Profiling In The Polygraph Test

It is true that the polygraph machine can detect psychological responses to a series of questions. The test basically focuses on three indicators of what is known as autonomic arousal. Respiration, skin conductivity, blood pressure/heart rate are the three indicators that the lie detector test is designed around. How these indicators are measured will be described more in depth below. It is important to note that examiners cannot measure psychophysiological changes just by monitoring the individual’s behavior. However, it is possible to suspect deception, if the individual attempts to alter the test by refusing to sit still throughout the exam.

Pretest Interview

Everyone who agrees to undergo a lie detector test will be required to attend a pretest interview. During the interview, the examiner will explain what the lie detector test is, how it works and its purposes. Also, the examiner will go over the type of questions utilized for the testing. The questions will always have a “yes” or “no” answer. It is also not unusual for the examiner to go over the questions that will be utilized for the scheduled test.

Respirations

The process of air moving in and out of the lungs is breathing. This process is controlled by the autonomic nervous system. While breathing is done unconsciously, the individual can also control it. Breathing is a necessity to sustain life and it can react differently to certain situations. For instance, if someone is in fear of something, the respirations will increase drastically.

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