- Mitchell G. Ash
Heider, Fritz (18 February 1896–02 January 1988), psychologist, was born in Graz, Austria, the son of Moriz Heider, an architect in the Styrian provincial government, and Eugenie von Halaczy. He was taught at home until the age of nine. An accident with a cap pistol that damaged his left eye kept him out of military service and later made it natural for him to be interested in perception. After studying architecture and law, he earned a doctorate in philosophy from the University of Graz in 1920 for research under Alexius Meinong on the representation of objects in consciousness—an issue on the border between cognitive psychology and the theory of knowledge that would concern him throughout his life....