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.
Carl Murchison
Carl Allanmore Murchison (1887–1961) was an American psychologist and an early promoter of the discipline of psychology. Unlike most psychologists who became prominent in the history books, Murchison was not an influential theorist or researcher. Instead, he was an extremely active organizer, publisher, and editor.