Muscle movements in the face reveal every lie
Foto:
Pixabay
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Technology “reads” the face
Lies have short legs. With the help of a new technology, they could also be exposed at a distance in the future.
TEL AVIV (inn) – Israeli scientists found a method in a study to convict liars with a 73 percent probability. With the help of highly sensitive electrodes on the face, they were able to record the smallest muscle movements in participants in a study experiment. These movements are usually carried out unconsciously by us humans when we are telling the truth or lying.
The study identified two types of “liars”: those who use their cheek muscles to lie and those who raise their eyebrows. The aim of the scientists 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 the data from the study tests.
The future of lie detectors?
“The accuracy of the test will increase as development progresses. We hope that it will be a serious alternative to polygraph tests in the future, ”said Dino Levy, a member of the Tel Aviv University’s team of scientists, told the Times of Israel online newspaper. In the future, high-resolution cameras will be able to detect liars from a distance with the help of AI. The technology can be used in banks, police interrogations or online interviews. This would support police officers or bankers, for example.
Even though the technology is still in the experimental phase, Levy believes his team’s method could be better than current polygraph tests: “Many studies show that it is almost impossible to know when someone is lying to us. Even experts, like interrogators, are just a little better at it. Existing polygraph tests are unreliable and can be fooled. ”Everyone can learn how to control their pulse and thus fool the machine. “As a result, there is a high demand for a more precise technology that detects deceptions,” adds Levy.
Course of the study
It has long been known that people unconsciously activate their facial muscles when they lie. So far, however, no electrodes have been sensitive enough to capture these movements, as Levy explains. To do this, the researchers first had to develop their own wireless “sticker electrodes” that could recognize minimal muscle signals. These were stuck on the participants’ cheeks and on the muscles above the eyebrows. The test subjects were then asked to sit opposite each other in pairs. One of them was told either the word “line” or “tree” over headphones. He then had to return the word to his partner, but could decide whether to tell the truth or lie.
The result: Most of the test subjects were unable to find out the partner’s lie. However, the scientists were able to use the electrical signals to uncover 73 percent of the lies. “Not perfect, but much better than other technologies,” comments Levy. The study was published in the scientific journal “Brain and Behavior” released.
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