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.
Austria
A focus of Austrian science has always been medicine and psychology, starting in medieval times with Paracelsus. Eminent physicians like Theodore Billroth, Clemens von Pirquet, and Anton von Eiselsberg have built upon the achievements of the 19th-century Vienna School of Medicine. Austria was home to Sigmund Freud, founder of psychoanalysis, Alfred Adler, founder of Individual psychology, psychologists Paul Watzlawick and Hans Asperger, and psychiatrist Viktor Frankl.