This research result was published in the Journal of the National Academy of Sciences on March 3 1. Du Shichuan, the first author of the paper and a doctor at Ohio State University, said that it is generally believed that human beings have six basic expressions: happiness, sadness, fear, anger, surprise and disgust. However, by combining these basic expressions, at least 15 additional combined expressions can be generated. For example, the combination of happiness and surprise is a new expression-surprise.
Alex, one of the authors and Du Shichuan's tutor? Martinez said: "We have gone beyond simple expressions like' happiness' or' sadness'. We determine that human beings can make 2 1 expressions through facial muscle movements. At least in our culture, almost everyone expresses these 2 1 emotions in the same way. "