What will happen to the liar’s physical and psychological
The fairy told Pinocchio that anyone who lied would have two changes in his body: a longer nose or shorter legs.
In reality, when people lie, physical and psychological changes also occur, but this depends on the level of the liar. A smart liar is difficult to judge by looking at the appearance, and he can even lie to a polygraph.
Details of general liars are revealed. Yu Donghui, a member of the Psychological Crisis Intervention Alliance of Guangdong Province, introduced that behavioral psychology can be used to analyze the liar’s division of weekday voices, expressions, and eyes. There are some changes. Of course, this can only be for ordinary people and smart liarsIt is difficult to spot flaws in appearance.
Usually, the speaker’s voice will be different than before.
Some studies have shown that the average tone of a person when lying is higher than the average tone of telling the truth, but the difference is small, and it is difficult to judge with ears alone.
Yu Donghui said that in eye contact with the people who listened to him, his eyes would fluctuate, his expressions were a bit unnatural, and he had secrets in his heart, which made it difficult for him to snicker.
Psychological hints can fool the polygraph how to deal with a smart liar?
It was proposed to use a polygraph.
The traditional polygraph is also called “multiple recorders”. According to its theory, when the subject is lying, the heartbeat will accelerate, sweating, and even shortness of breath.
In this way, the polygrapher records and analyzes the pulse, blood pressure, respiration, and changes in skin resistance of the person under test to determine the truth of the person’s statement.
Yu Donghui said, but the continuous application of traditional polygraphs has been questioned for its basis and effect.
That is, the cheating behavior has no unique physiological characteristics, and the physiological signal that the traditional polygraph relies on has only a weak connection with the psychological state of the test subject.
And the liar can convince the body that nothing lies has happened through self-suggestion.
At the beginning of the use of polygraphs, subjects were overly convinced of the role of polygraphs and scared themselves to confess.
But when the person being tested is not intimidated, it is difficult to tell if the polygraph instrument is still helpful.
In some cases, polygraphs are indeed better than random guessing, but it is difficult to know why.
The height of the EEG wave was at a time when traditional polygraphs were in great doubt, and some researchers began to look for other ways to detect lies.
According to Yu Donghui, these emerging “polygraph” methods include measuring brain waves and directly detecting brain activity using magnetic resonance imaging, because it is pointed out that the brain is not so easily deceived by so-called psychological cues.
According to reports, a few years ago, Dr. Scott Farol, director of the Brain Functional Imaging Center at the Temple University School of Medicine in the United States, led a research team in the latest study to find that people have significantly different brain activities when speaking the truth and lying.And lying requires more brainpower.
Research reports claim that using a brain scanner to perform a brain scan can more accurately determine whether a person is lying.
There is also functional magnetic resonance imaging.
This polygraph uses high-resolution thermal imaging technology to scan the subject’s face.
Determine whether the subject is lying by observing whether the subject’s eyes are flushed.
And this scanner is the latest brainwave polygraph.
It uses nuclear magnetic resonance technology to scan the brain of a rangefinder, and it is longer judged as the authenticity of the rangefinder’s speech.