Hans Walter Gruhle (7 November 1880, in Lübben – 3 October 1958) was a German psychiatrist known for his work on the relationship between criminology and psychology.
[1] Gruhle was educated in Leipzig, Würzburg, and Munich, receiving his first doctorate in Munich in 1904 under the supervision of Emil Kraepelin.
[2] In 1905, he joined the psychology department at Heidelberg University, remaining there for almost 30 years.
He subsequently advised Weber's work in the field of experimental psychology.
[2] He also wrote journal articles about such topics as the sterilization of criminals[1] and the utility of the ergograph.