What's the difference between people's facial expressions when they giggle?

First, when you laugh, you only use the muscles in your cheekbones, but your mouth moves. The orbicularis oculi muscles and cheeks are elongated, which is a fake smile. So when you giggle, the muscles in your cheeks are relaxed and your eyes will not squint. Cunning swindlers make up for these shortcomings by wrinkling the muscles of the big cheekbones layer by layer. This action will affect the orbicularis oculi muscle and loose cheeks, making the eyes squint, thus making the fake smile look more realistic.

Second, a fake smile can last for a long time. A real smile can only last 2/3 to 4 seconds, and the duration mainly depends on the intensity of feelings. On the other hand, a fake smile is as embarrassing as a guest who refuses to leave after a party. This is mainly because the fake smile lacks the intrinsic motivation of real emotion, so we don't know when it should end. In fact, if any expression lasts more than 10 seconds or 5 seconds, it may be fake. Only some strong emotions such as anger, ecstasy and depression are exceptions, and these manifestations often last for a short time.

Third, when you see someone else's real smile with feelings fade naturally, the fake smile will go with it. For most expressions, the sudden beginning and end indicate that we are consciously using this expression. The only exception is surprise, which passes in an instant, and the total time from start to stop will not exceed one second. If it lasts longer, his surprise is fake. Many people can imitate the expressions and actions of surprise-eyebrows raised, mouth wide open-but few people can imitate the sudden beginning and end of surprise.

Fourth, when you giggle, the expressions on both sides of your face are often slightly asymmetrical. People who are used to using their right hand will pick up the left corner of their mouth higher when they giggle, while those who are used to using their left hand will pick up the right corner of their mouth higher.

Laughing too early or too late may indicate a deceptive expression. For example, if a person says, "Didn't I already tell you?" Then he flew into a rage, which was mostly an affair. His expression is very affected. Facial expressions and body postures should occur at the same time, not after them. For another example, a person who shows anger after hitting the desktop is actually putting on airs and acting.

Finally, a fake smile can cover up ruthlessness and cruelty. When Count Drakula smiled and said that he only wanted to live alone in London, Jonathan Huck felt something hidden in his smile. "What he said is a little out of harmony with his smile. His face makes the smile look hostile and ironic."

Hidden emotions are often exposed in the upper part of the face. The poet thomas white (1503 ~ 1545) said: "Eyes are traitors to the mind". Your eyes, eyebrows, forehead and surrounding muscles will expose your psychology. In the crowd, Pi Nuo's nose is real. When a person tries to hide his inner pain with a smile, it is often his eyes that reveal the secret, from which we can read sadness and sadness. A recent study found that when clues from the mouth and eyes conflict, the eyes will get the upper hand and win.

The forehead is the center of these muscles. For example, when a person is sad, distressed, miserable and guilty, the inner corner of his eyebrows rises and his forehead wrinkles to the middle. Only less than 15% people can fake this expression. It's even harder to pretend to be afraid and sad. These manifestations are: eyebrows raised, eyebrows wrinkled together. They can easily reveal secrets, and only 10% people can put on this expression.

The unnatural appearance of muscles in other parts of the face can also reveal secrets well. For example, in times of pain and sadness, the lip angle is pulled down, while the muscles of the chin are motionless. Only less than 10% people can make this action at will. Tight lips are a reliable sign of anger. This often reveals a person's inner feelings, which is fundamentally a warning. Lips don't obviously pull together or press together, just sip inward to form a rather severe expression. People can learn and imitate these expressions, but it takes hundreds of hours.

Smart liars often hide their inner fears and guilt with such strong feelings as anger. 1960, the judge who interrogated Adolphe-Mann soon learned that whenever Eichmann shouted "No! Don't! Never, Lord hauptmann! " Or "never! Never! " At this time, he was lying. At Thomas Hill's hearing, what Anita Hill said sounded quite pleasant and clearly pronounced, but Thomas was furious. Although it is difficult for us to detect that his angry expression is to cover up his inner hypocrisy, it may really cover up a lot of lies for him.

Few people know that subtle expression is often the key to our identification of lies. Sometimes, in an instant, the hidden truth will suddenly pop up on my face. By analyzing the video of the Iran-contra hearing, we can see that John Pender lied. When someone asked John Peund about his meeting with william casey, director of the Central Intelligence Agency, his face was as red and white as a picture book. This expression only lasted 1/4 seconds. Obviously, the calm Pender Cox concealed the important facts of this meeting. The interrogators missed this opportunity and didn't get to the bottom of it and find out the truth.

It is not easy to use subtle changes in expression as evidence to identify lies. A more complicated and common phenomenon is bluffing. When a person feels that his disguised expression is invalid, usually, he will quickly cover it up with a smile. Some people hide their true feelings by bluffing, which lasts longer than subtle changes in expressions. During this period, we can't even understand the speaker's true feelings. All we can perceive is the big talk itself.