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300 BCE
Stoicism
A school of Hellenistic Philosophy was founded. -
G. Stanley Hall
The first American to earn a Ph.D. in psychology. Hall eventually founds the American Psychological Association. -
William Wundt
Wilhelm Wundt founded the first experimental psychology lab in Leipzig, Germany. -
Psychology Journal
Wundt forms the professional journal of physiological psychology studies. -
John Hopkins University Lab
G. Stanley Hall opens the first experimental psychology lab in the United States at John Hopkins University. -
Sigmund Freud
Sigmund Freud begins providing therapy to patients in Vienna, Austria. -
James Mckeen Cattell
James McKeen Cattell becomes the first professor of psychology at the University of Pennsylvania. -
The Practice of Psychological Assessment
James McKeen Cattell publishes Mental Tests and Measurements, marking the beginning of the practice of psychological assessment. -
William James
William James publishes Principles of Psychology. -
Sir Francis Galton
Sir Francis Galton creates correlation technique to better understand relationships between variable in intelligence studies. -
American Psychological Association
G. Stanley Hall founded the American Psychological Association (APA), which initially has just 42 members. -
Edward B. Titchener
Wundt’s student Edward B. Titchener moves to America. -
Margaret Floy Washburn
Margaret Floy Washburn completes her training under Tichener. -
Alfred Binet
Alfred Binet forms the first psychology lab devoted to psychodiagnosis. -
Edward Thorndike
Edward Thorndike develops the Law of Effect. -
Interpretation of Dreams
Sigmund Freud published Interpretation of Dreams. -
British Psychological Society
The British Psychological Society is formed. -
Mary Whiton Calkins
Mary Whiton Calkins is elected the first woman president of the American Psychological Association. -
Intellectual Level of Subnormals
Alfred Binet publishes the intelligence test New Methods for the Diagnosis of the Intellectual Level of Subnormals. -
Ivan Pavlov
Ivan Pavlov publishes his findings on classical conditioning.