Left-handed people are also called "left-handed", and "profit" refers to which hand they are used to. It's nonsense to say that left-handed people are smart. The opponent's control in the brain is crossed. Left-handed refers to the right brain (figurative, such as the beauty of sound and body, spatial imagination) thinking better, and the left brain (abstract, such as logical reasoning language) thinking worse, while the average person is just the opposite. Because China's education mainly focuses on abstract content, left-handed people look smarter, but there is no research. In addition, the proportion of left-handed people in China is less than 2‰, which is much less than that in other countries. Why left-handed people pay attention to right-handed people is decided at the age of three or four. At the age of three or four, the brain development is relatively parallel, and then which side is used will form the distinction between left-handed and non-left-handed.

Books: the magical world of left-handed,

Left-handed: invincible