Generally speaking, long-term expressions—some lasting about ten seconds or more, usually about five seconds—are almost always fake. Really heartfelt expressions do not last long unless the emotion re

Generally speaking, long-term expressions—some lasting about ten seconds or more, usually about five seconds—are almost always fake. Really heartfelt expressions do not last long unless the emotion reaches the extreme, such as ecstasy, anger or overwhelming sadness, etc. At this time, the true emotional expression can only stay on the face for a few seconds at most. Even in extreme situations, facial expressions rarely last that long. There are no hard and fast rules for how quickly an expression appears and fades, which is a clue to lying. But surprise is an exception. Real surprise appears, lasts and subsides very briefly, lasting less than a second. If it is longer than this, it is usually either a joke (surprise is a joke), an emoticon (surprise is a statement), or simply pretending, because once the unexpected thing is clarified, the person involved will quickly come back to his senses. Come. Most people know how to pretend to be surprised, but not many people really know how to make surprise come and go quickly. 3. Relative order Relative order refers to the accurate positioning of expressions relative to the flow of words, voice changes and body behavior. Suppose someone is angry and says, "I'm really annoyed by you." If the angry expression appears after the words are spoken, you can conclude that the expression is fake. But if the expression appears at the same time as speaking, or even before the words are spoken, it will be more difficult to determine whether it is true or false. The relative sequence between facial expressions and body movements leaves less room for maneuver. Let’s also assume that the person who was annoyed to death was angry and pounded the table. If the angry expression appeared after pounding the table, it can also be concluded that it was Pretending