Famous Psychologists By Gweichelt Period: 1848 to Jan 1, 2025 Phineas Gage suffers brain damage 1861 Paul Broca discovers Broca's area 1879 Wilhelm Wundt founded the first psychology laboratory 1883 The first psychology laboratory is set up at Johns Hopkins University 1890 William James publishes Principles of Psychology 1894 Margaret Floy Washburn earns her Ph.D. in psychology 1897 Ivan Pavlov publishes on Classical Conditioning ( 1898 Edward Thorndike publishes work on animal intelligence 1900 Sigmund Freud publishes The Interpretation of Dreams 1912 William Stern develops the IQ formula 1913 John B. Watson publishes Psychology as the Behaviorist Views It 1923 Jean Piaget publishes The Language and Thought of the Child 1938 B.F. Skinner publishes The Behavior of Organisms 1939 Karen Horney proposes the social-cultural perspective 1950 Erik Erikson publishes Childhood and Society 1953 The Code of Ethics for Psychologists is created 1954 Abraham Maslow founds Humanistic Psychology (1943–1950s) 1961 Carl Rogers publishes On Becoming a Person 1983 Howard Gardner introduces Multiple Intelligences 2013 DSM V is published