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The mind was originally thought to be in the stomach, although Aristotle proposed processes came from the heart.
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Philippe Pinel wanted to find a way to improve conditions for mentally ill patients. He influenced his assistant to free the patients held in Paris.
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Ernst Heinrich Weber releases his theory of touch, called Weber's Law.
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Phineas Gage survives a pole blown through his head. His personality is altered and gives insight into the function of the brain.
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Paul Broca theorizes that the left frontal lobe is what allows humans to comprehend language.
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Stanley Hall achieves the first degree in psychology in United States history.
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Wilhelm Wundt opens the very first psychology lab and begins formal psychological studies.
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The first psychology lab in America is opened by Johns Hopkins University.
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Sigmund Freud treats patients in the first therapy sessions and begins personality work.
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James Cattell describes psychological assessments as "mental tests" and begins to specialize within it.
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Alfred Binet opens the world's first psychodiagnosis laboratory in France.
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The first psychological clinic opens within the halls of the University of Pennsylvania.
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John Watson begins research on behavioral psychology.
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Carl Rogers suggests that kindness and unbiased opinions are critical in the field of clinical psychology.
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A reference for mental illness classification is created. This book is called The Diagnostic and Statistical Manual of Mental Disorders.
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The American Psychological Association writes the Code of Ethics for Psychologists to ensure the wellbeing of patients.
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On Becoming a Person is written by Carl R Rogers as a statement about how the mentally ill should be treated.
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Alfred Bandura tests the hypothesis of observation on personality and development.
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Howard Gardner comes up with the idea of "multiple intelligence," which means that intelligence comes in a wide variety of forms. He also argues that intelligence is not a measure of someone's worth to society.
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The American Psychological Society is formed.
