Telling lie is a human tendency to escape from certain complexities. People say lies for many reasons. The reasons may vary from simple to complex. It may be due to necessity to help others, to spare someone’s feelings, to escape from the situation and many more. Some lies are told for the benefit of others, which do not do any harm. The complexities arise from those who say lie to escape from the judicial custody. The persons do harm to others and for escaping from the legal issues they lie.
Lie detector testing is important in the situations like investigation by the police, court trials and more. Its main theme is psychology and law. It may be referred as questioning techniques along with scientific technology in detecting the victims. Nowadays there are many lie detector tools available ranging from observing the behaviour, speech response and the measuring the physiological responses which will be different when the person is telling lie. The testing is from ancient times, but the methods and tools have changed. The accuracy of the tests depends upon the situation and how they are handling it. Professionals from www.liedetectors.co.uk are known in UK for providing a very reliable and time-tested lie detector services.
Techniques of detection
There are two techniques of detection one is nonverbal detection related psychological behaviour and the other is verbal detection related physiological changes. Non verbal detection includes facial expressions, emotions, behaviour analysis, voice stress analysis, reaction times and many more. Verbal detection tools include statement validity analysis, reality monitoring, scientific content analysis, event related potentials; brain imaging, symptom validity testing, comparison question technique, concealed information test, thermal imaging and some neurons based techniques.
Theories associated with lie detection
There are many theories associated with the lie detector testing. But most of the tests are based on the emotions, thinking load and trying to make a convincing impression. The liars pretend smartly and try not to show their responses which will hold them victim. The efforts made by them are called the counter measures. Telling lies may vary from small mistake to bigger ones. The detection of the lie is generally related to the big mistakes or blunders. The tests should be done under the supervision of trained and experienced professionals. The accuracy of the lie detection techniques cannot be predicted as it depends on many variables. In the recent years many researchers are researching for the accurate tools which will be useful to increase the chance of discriminating between the lie and the truth. The evidence we get from the techniques would be helpful for the further prosecution.