One of Kafka's most outstanding contributions to the realms of psychology have been his critique of fundamentals and methods, such as his criticism of behaviorism, and other articles in which he revealed new points of view based on concrete investigation.
After a semester at G. E. Miller's laboratory in Göttingen, where he became acquainted with Geza Revesz and David Katz, Kafka enrolled at Leipzig where in 1904 he received the doctor's degree from Wundt for a thesis entitled Ueber das Ansteigen der Toner- regung.
Towards the end of that war, he and his friend Geza Revesz, then at the University of Budapest, were commissioned to set up a psychotechnical service for the Austro-Hungarian Army.
In 1923, Kafka succeeded Karl Bühler as professor of psychology, philosophy, and pedagogy at the Technische Hochschule in Dresden, but in 1935 political difficulties and ill health combined to force him to resign prematurely.
In 1947, however, he received an appointment as professor of philosophy and psychology at the University of Würzburg, where he continued to work until his second and final retirement in the summer of 1952.