Gustav Fechner
Fechner, along with Wilhelm Wundt and Hermann von Helmholtz, is recognized as one of the founders of modern experimental psychology. His clearest contribution was the demonstration that because the mind was susceptible to measurement and mathematical treatment, psychology had the potential to become a quantified science. Theorists such as Immanuel Kant had long stated that this was impossible, and that therefore, a science of psychology was also impossible.
Eastern philosophy in clinical psychology
Abraham Maslow, an American-born Jew who struggled to make his way as a psychologist in an academic atmosphere which was not then ready to receive Jews. He believed his theories of motivation and self-actualization were, despite his avowed atheism, driven by a Jewish consciousness. The Transpersonal psychology that Maslow founded is a blend of Eastern and Western mystic traditions.