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.
Archetypal psychology
Carl Gustav Jung was a Swiss psychologist who was the first father of archetypal psychology. Jungian archetypes are thought patterns that find worldwide parallels in individuals or entire cultures. Archai appear in dreams, religions, the arts, and social customs in all people and they manifest impulsively in mental disorders. According to Jung archetypal ideas and patterns reside within the collective unconscious, which is a blueprint inherent in every individual, as opposed to the personal unconscious, which contains a single individual's repressed ideas, desires and memories as described by Freud. What differentiates Jungian psychology from archetypal psychology is that Jung believed archetypes are cultural, anthropological, and transcend the empirical world of time and place, and are not phenomenal. On the contrary, Archetypal psychology views archetypes to always be phenomenal.