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.
Sante De Sanctis
Sante de Sanctis (7 February 1862 Parrano – 20 February 1935 Rome) was an Italian doctor, psychologist and psychiatrist. He is considered as one of the founders of the Italian psychology, neuropsychiatry and dreaming psychology.