In the eyes of most amateur players, the most common method to understand their opponent's trump card is nothing more than "staring at the face". Frowning? Maybe it's won. Pull the corner of your mouth? The possibility of bluffing is not small. However, a research from the psychology laboratory of Tufts University in the United States is challenging the long-standing "face belief" in this poker circle. The psychology of Depuo: Professional players are most afraid of you to see this! The researchers found dozens of subjects and played 20 short videos of professional players playing cards, each with only 2 seconds, asking them to judge the card power in the player's hands. Surprisingly, judgments made based on facial expressions are not only inaccurate, but sometimes they are even more outrageous than "submitting one". However, the other group of subjects who only relied on observing arm movements had the opposite result: their judgment accuracy was significantly high