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.
Michael Posner (psychologist)
Michael I. Posner (; born September 12, 1936) is an American psychologist, the editor of numerous cognitive and neuroscience compilations, and an eminent researcher in the field of attention. He is currently an emeritus professor of psychology at the University of Oregon (Department of Psychology, Institute of Cognitive and Decision Sciences), and an adjunct professor at the Weill Medical College in New York (Sackler Institute). A "Review of General Psychology" survey, published in 2002, ranked Posner as the 56th most cited psychologist of the 20th century.