A system that detects lies by detecting facial muscles

An Israeli research team has developed a system that detects lies in the electrical activity of facial muscles using electrodes placed on the face. Although the study itself is in its infancy, it reports that the highest level of accuracy has been achieved with this kind of technique.

The lie detection system developed by the Tel Aviv University research team uses electrode stickers that monitor and measure the developed muscle and nerve activity. This electrode sticker is being commercialized as a sleep monitoring device by the healthcare company X-trodes Ltd., but this time the research team decided to use the device as a lie detector.

The research team conducted an experiment in which the problematic electrode recognized a lie by attaching a sticker to the cheek muscle close to the lips and the upper eyebrow muscle in 48 subjects. Subjects were instructed not to lie while receiving instructions through earphones using two words for the liar and the tree, in pairs, the liar and the lie seeker. If he did not lie, he spoke as instructed, but if he was telling a lie, he was told to say “good” when instructed to do so, and said “good” when instructed to criticize.

As a result of the experiment, it was found that the role of detecting lies does not detect lies, but the authenticity was determined from the muscle activity measured from the electrode stick, and with this type of technology up to 73%, it succeeded in detecting lies with the highest level of precision.

In this experiment, it was also found that there was a brot when lying to the subject, so that the subjects with the cheek muscles activated and the subjects with the eyebrow muscles activated, and that the role of detecting lies is good at lying that cannot detect lies at all. As for the subject, he said he learned that he couldn’t see it in this system either.

The research team is positioning this experiment as an early stage, and this is the first study, saying that the lie itself is simple and there are many signs of a lie, so they only found two of them. Regarding the future prospects, he said that in the future, it will develop video software that identifies lies by determining facial muscle movements from appearance, making electrodes unnecessary. Related information can be found here.