In what year was the developer of the psychological theory "Field theory" born?
Kurt Lewin Kurt Lewin (September 9, 1890 – February 12, 1947) was a German-American psychologist, known as one of the modern pioneers of social, organizational, and applied psychology in the United States. Exiled from the land of his birth, Lewin ( ) made a new life for himself, in which he defined himself and his contributions within three lenses of analysis: applied research, action research, and group communication were his major offerings to the field of communication.
Christian von Ehrenfels Christian von Ehrenfels (also "Maria Christian Julius Leopold Freiherr von Ehrenfels"; 20 June 1859 – 8 September 1932) was an Austrian philosopher, and is known as one of the founders and precursors of Gestalt psychology.