This is a generation where technology is growing rapidly. One of the greatest inventions found can be said as polygraph machine. It is used to detect a lie. This is used to know if the information given by the victim is correct or not according to the situation. Lie detection process is generally carried out by the polygraph machine which all depends on the body actions. Let us know about it by the following description.
What is lie detection process?
- Lie detection is a process which is used by control questioning. It is referred to as the polygraph test which is recognized by the physiological functions. During lie detection, the victim’s body language is used to detect his reaction and can be considered as a base to any situation. The machine works by detecting the person’s blood pressure, heart beat and his breathe is also considered. Things like his voice analysis also play a role in arriving at a result.
What is a polygraph machine?
Many firms use lie detection analysis in various situations. It is majorly used to detect if the victim is at fault and the results of this test are used only as a base of any investigation.
- Polygraph machine is a major part of lie detection where the baseline of vital sign is noted before. Here we see that it all goes with the emotions during the control questions where there might be changes in respiratory, skin fluctuations, voice change, blood pressure increase etc., when the machine detects any of the sign a blip is found on the machine which indicates a lie. Obviously when the examiner asks the questions to the examinee , there might be a chance where the answers might be “no” to all the questions but the examiner can easily identify the falsehood of the examinee.
How does the machine work?
When using a polygraph machine, there are about 4-6 sensors attached to the examinee and the machine reads the poly (multiple) signals from the sensors. These recordings are noted on a paper in the form of a graph.
In the test, formation of questions is quite important. Designing the questions appropriately plays a vital role in getting the right results. Asking too many questions will not help. Hence, you need to ask only about 3-4 questions which are clear and not lengthy. There are even phases of asking questions. The examiner might have a first interaction where he would check the understanding of the examinee by asking him some of the questions. And then go ahaead with 2 more phases of questions. The questions should be clear and should be designed in such a way that they are understood in the same way by everyone.