January 21, 1887 (BingXu twelfth lunar month 28), the German-American psychologist, one of the founders of Gestalt psychology Koehler was born.

Koehler (1887 to 1967), an American of German descent psychologist. One of the representatives of Gestalt psychology. Born January 21, 1887 in Tallinn, June 11, 1967 and died in Enfield, New Hampshire, USA. Doctorate in philosophy from the University of Berlin in 1909. Ren Bolin University professor and director of the Institute of Psychology in 1921. In 1912, he and K. Kefu Ka join M. Wertheimer phi phenomenon experiment jointly laid the foundation of Gestalt psychology. Settled in the United States in 1935, was elected chairman of the American Psychological Association in 1959. Published in 1917, the "wisdom of the Apes," a book, he describes the experiments on animals to solve the problem, epiphany learning theory. In perception, he proposed graphical perception of the law, and strong support for the Gestalt perception theory. Writings there is value in the fact that the world ", the psychological dynamics, Gestalt psychology.
Gestalt psychology: the psychological phenomenon of the most basic features of the structural integrity of conscious experience embodied.