Wolfgang Metzger (1899-1979) was a central figure in the Gestalt movement within psychology in Germany. He was Director of the Psychological Institute at the University of Münster.

Lothar Spillmann, was for many years Professor in the Brain Research Unit at the University of Freiburg, is Visiting Professor at the Herder Foundation, Bonn, and the China Medical University, Taichung, Taiwan. He editedWolfgang Metzger's Laws of Seeing (MIT Press, 2005), another classic work from the Gestalt movement.