From 1930 to 1933, Kurt Lewin (1890-1947) studied psychology and sociology at the University of Frankfurt (aka The Frankfurt School) in Germany and became director of Tavistock Institute in 1932. Drawing on the quackery of Freud, Lasswell, Leonard Doob and others, Lewin examined the psychology and power of suggestion created by stimuli and stimulus situations.
https://www.winterwatch.net/2023/04/the-tavistock-method-of-brainwashing-and-social-psychiatry/