The world is in need of a way to seek the truth. This is a sad reality that shouldn’t be taken for granted. There are jobs that require utmost honesty and criminal cases that must be thoroughly investigated by the authorities. These matters need the help of lie detector testing so that there will be a smooth transaction in the end.
Upon knowing the importance of polygraph testing, it’s also essential to know its history. By doing this, we will value it even more in all of our professional and personal dealings. This will also be helpful in understanding the lie detector test uk trend in the industry.
The Early Days of Polygraph Machines
Polygraph machines started to surface in the world of mankind since 1902. There was a person who invented an inadequate polygraph device. His name is James McKenzie. In the 18th century, another brilliant man named John Larson, who is from the University of California, invented the polygraph machine. This time around the product produced more accurate results compared to the one created by James McKenzie.
However, it was not considered a technically advanced invention even if it showed off different physiological responses during li detector testing. In a revolving container of smoke paper, the machine recorded the pulse rate, blood pressure and respiratory reaction of the subject.
In 1925, the use of polygraph machines was upgraded to the highest level. In an effort to maximize the use of lie detector machines, a man named Leonarde Keeler created a version of Larson’s invention by eliminating the use of revolving drum to record the results of the rest. Keeler’s creation has ink to make sure that the recording of the outcome of the lie detection test is more accurate, relevant and efficient.
Modern Lie Detector Devices
Later on, Keeler created another top-notch product out of the one he initially developed in 1925. He improved the efficiency of the item by adding a measuring tool through galvanic skin resistance. Due to the need to improve the lie detector testing device, a man named John Reid invented a way to compare answers of the subject. The idea to develop “control questions” made the comparison possible. In 1992, the device became computerized after a series of product development. The influx of computerized polygraph machines tremendously improved the results of testing the subject in terms of accuracy and efficiency.