A new study reveals how to fool the lie detectors

Credits Disney

Trap, a lie detector, it is possible, at least if one believes this recent study, conducted by researchers from the university of Plymouth, England. Published on the website of EurekAlert, the latter reveals that the rate of accuracy of a lie detector by imaging of the brain can easily be reduced by 20% in the following two method of hiding distinct.

First technique for hiding of detail by the researchers from the university of Plymouth, the memory significant. If a potential suspect of theft, for example, is placed in front of several objects, sit brain can unconsciously reveal to a lie detector what object has been stolen. To distort the outcome of such a test, yet do not focus only on the object to be concealed, but rather on another object, may evoke memories or particular feelings.

Another method to reduce the effectiveness of a lie detector, the suspect may also focus on only a surface appearance of the object to hide. Thinking only to its shape or its color for example, it is thus possible to fool the recognition MRI of the machine, which will be more difficult to identify differences in brain waves in the presence of the target object.

With a loss of accuracy of about 20% recorded thanks to these two concealment techniques, this new study proves that lie detectors, even in brain imaging, are far from infallible. While the european authorities have been working for several months already on the deployment of such machines in airports, you will probably have to wait a bit before having to deal with machines really reliable.