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.
Frank Barron (psychologist)
Frank X. Barron (June 17, 1922 - October 6, 2002) was an American psychologist and philosopher. He is considered a pioneer in the psychology of creativity and in the study of human personality.