Wilhelm Wundt
Wilhelm Maximilian Wundt (; ; 16 August 1832 – 31 August 1920) was a German physician, physiologist, philosopher, and professor, known today as one of the founding figures of modern psychology. Wundt, who noted psychology as a science apart from philosophy and biology, was the first person ever to call himself a psychologist. He is widely regarded as the "father of experimental psychology". In 1879, Wundt founded the first formal laboratory for psychological research at the University of Leipzig. This marked psychology as an independent field of study. By creating this laboratory he was able to establish psychology as a separate science from other disciplines. He also formed the first academic journal for psychological research, "Philosophische Studien" (from 1881 to 1902), set up to publish the Institute's research.
John Dewey
In 1984, the American Psychological Association announced that Lillian Moller Gilbreth (1878–1972) had become the first psychologist to be commemorated on a United States postage stamp. However, psychologists Gary Brucato Jr. and John D. Hogan later made the case that this distinction actually belonged to John Dewey, who had been celebrated on an American stamp 17 years earlier. While some psychology historians consider Dewey more of a philosopher than a bona fide psychologist, the authors noted that Dewey was a founding member of the A.P.A., served as the A.P.A.'s eighth president in 1899, and was the author of an 1896 article on the reflex arc which is now considered a basis of American functional psychology.