The brain can "hear" whether laughter is true or not. Why? How to explain it?

The next time you play a stupid joke with someone you don't know very well, realize that they may be smirking. Researchers in London have found that when we hear a real smile and a fake smile, our brains will react differently, even if we don't know if it is true or cheated. The part of the brain that interprets emotional information responds to fake smiles. This means that when we hear a smirk, we know it's not true. According to our understanding of the world, our brains will automatically analyze the reasons for smirking, the meaning of smirking, and what the other person wants to say. Spontaneous laughter activates areas of the brain associated with happiness and positive emotions.

To test this theory, Dr Caroline Magtigan, a psychologist at Royal holloway College, University of London, asked volunteers to listen to an interesting video and monitor their brain reactions. The brain activity of participants when they heard real laughter was compared with their responses when they heard fake laughter. The results show that when participants are not told what they are doing, people are more likely to distinguish between real laughter and fake laughter. For this experiment, Magtigan said.

The brain is a magical way to perceive the happiness of others. She pointed out that the human brain is sensitive to the world knowledge, social information and emotional information implied in laughter, and it is easy to identify. The results show that participants can subconsciously identify the smirk without telling them what they are doing. This is because smirking activates the part of the brain that specifically interprets emotional information. That is to say, when a person hears a fake smile, he knows that it is not true, and his brain will automatically analyze the reason, hidden meaning and the other person's real thoughts.

Spontaneous laughter activates areas of the brain associated with happiness and positive emotions. Dr. Magtigan said that some people who took the laughter test also used the parts of the brain that control movement and perception, so they could better distinguish between real laughter and fake laughter. This shows that the human brain is very sensitive to the social and emotional effects of laughter.