Friedemann Schulz von Thun (born August 6, 1944 in Soltau [1] ) is a German psychologist and expert in inter- and intrapersonal communication. Schulz von Thun worked as a professor of psychology at the University of Hamburg until his retirement on 30 Sep. 2009. Among his various publications is a three-part book series titled "Miteinander Reden" (Talking With Each Other) which has become a standard textbook series in Germany and is widely taught in schools, universities, and vocational skills training. [2] [3] Schulz von Thun developed a number of comprehensive theoretical models to help people understand the determinants and processes of interpersonal exchange and their embeddedness in the individual inner states and the outward situation. He invented the four sides model and developed the inner team model and a visualization of the value square. [2]
