You may have seen the demonstration of lie detectors in movies. The cable of the apparatus makes a relationship between the lie detector and the individual being tested. The machine draws lines on the paper to help the professional determine if the man is lying or telling the truth.
According to the latest studies, the truth of a lie detector varies between 70% and 95%. Let’s now take a look at a few of the benefits provided by this machine.
Benefits and Usage
Since lie detector tests are rather popular, more and more people are beginning to use them. Nowadays, they are being used for social research projects.
Frequently, lie detectors can have an impact on the way the subject gives answers to the questions. While they aren’t used solely to learn the truth, they do assist document changes in the physiological indices of this subject. So, the experiments are done together with before and after interview tests.
It’s important to note that some companies also use polygraph tests. The tests are done as a way to screen prospective personnel.
Another common use of these devices involves the assessment of the statements given by the witnesses and suspects. Additionally, law enforcement agencies also use them to track the post-conviction offenders. However, it is important to say that the machines aren’t utilised to determine whether the subject is really guilty.
It’s interesting to note that toy lie detectors are also quite popular with kids. Interestingly enough, these toys are based on similar algorithm and may give a mild electric shock to the subject when he tells a lie. However, it’s important to remember that the results might not be accurate.
Polygraph tests are quite popular, but the results of these tests can’t be accurate. The reason is that not everyone will give the identical reaction in a circumstance. As a result, the physiological indices of a person could be different from another test subject. That’s the main reason this device is not considered 100% reliable.
Also, polygraph tests are not worth it. The machine may provide misleading results. As a result, they have to perform the test all over again, which will have a whole lot of extra time.
Moreover, the tests can cost a great deal of money. Apart from the cost of the machine, it will cost additional money to hire a qualified professional for the interpretation of the test results.