November 30, 2021


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Israeli scientists debunk 73% of lies

Muscle movements in the face reveal every lie

Photo: Pixabay

Technology “reads” the face

Lies have short legs. With the help of new technology, it can also be detected remotely in the future.

TEL AVIV (Inn) – Israeli scientists have found a way in a study to convict liars of 73 percent. With the help of high-sensitivity electrodes on the face, they were able to record the smallest muscle movements in the study trial participants. These movements are usually performed unconsciously by us humans when we are telling the truth or when we are lying.

The study identified two types of “liars”: those who use their cheek muscles to lie and those who raise their eyebrows. The scientists’ goal is to teach artificial intelligence (AI) how it can analyze facial movements without the electrodes. This should be done with the help of cameras and data from study tests.

The future of lie detectors?

“The accuracy of the test will increase as development progresses. We hope it will be a serious alternative to future polygraph tests,” Dino Levy, a member of the team of scientists at Tel Aviv University, told The Times of Israel Online. In the future, high-resolution cameras will be able to detect Liars from a distance with the help of artificial intelligence. The technology could be used in banks, police interrogations or online interviews. This would support police officers or bankers, for example.

Although the technology is still in the experimental stage, Levy believes his team’s method could be better than current polygraph tests: “Many studies show that it is almost impossible to tell when someone is lying to us. Even experts, such as investigators, A little better at it. Existing polygraph tests are unreliable and can be deceived.” Everyone can learn to control their own impulse and thus fool the device. “As a result, there is a huge demand for more accurate technology that detects deceptions,” Levy adds.

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Study path

It has long been known that people unconsciously activate their facial muscles when they lie. But until now, no electrodes have been sensitive enough to pick up on these movements, Levy explains. To do this, the researchers first had to develop their own wireless “sticky electrodes” that could recognize minimal muscle signals. They were attached to the participants’ cheeks and to the muscles above the eyebrows. Then the test subjects were asked to sit opposite each other in pairs. Someone was told either the word “line” or “tree” over the headphones. Then he had to give the word back to his partner, but he could decide whether to tell the truth or lie.

The result: most of the test subjects were unable to detect the partner’s lying. However, the scientists were able to use electrical signals to detect 73 percent of the lies. “It’s not perfect, but it’s much better than other techniques,” Levy comments. The study was published in the scientific journal Brain and Behaviour. chest.

From: ml