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.
Otto F. Kernberg
Otto Friedmann Kernberg (born 10 September 1928) is a psychoanalyst and professor of psychiatry at Weill Cornell Medical College. He is most widely known for his psychoanalytic theories on borderline personality organization and narcissistic pathology. In addition, his work has been central in integrating postwar ego psychology (which was primarily developed in the United States and the United Kingdom) with Kleinian and other object relations perspectives (which was developed primarily in the United Kingdom and South America). His integrative writings were central to the development of modern object relations, a theory of mind that is perhaps the theory most widely accepted among modern psychoanalysts.