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.
Analytical psychology
Analytical psychology (sometimes analytic psychology), also called Jungian psychology, is a school of psychotherapy which originated in the ideas of Carl Jung, a Swiss psychiatrist. It emphasizes the importance of the individual psyche and the personal quest for wholeness.