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Plato writes the Theaetetus examining theories of perception, knowledge, and truth.
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Hippocrates proposses that mental illnesses are caused by an imbalance of four major fluids in the human body. This is the begning of psychology study.
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Descartes publishes, The Passion of the Soul, outlining the pineal gland as the seat of the soul.
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Charles Darwin publishes the theory of natural selection, which influences the field of evolutionary psychology.
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Gustav Fechner performed the first scientific experiment that would form the basis for experimentation in psychology.
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Wilhelm Wundt establishes teh first laboratory of psychology in Leipzig, Germany.
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Edward Titchener brought the idea's of structuralism to the United States after studying under Wilhelm Wundt.
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Margaret Floy Washburn is the first woman to receive a Ph.D. in psychology at Cornell University.
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Freud publishes, The Interpretation of Dream.
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Ivan Pavlov publishes his findings on classical conditioning.
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Max Wertheimer first developes Gestalt psychology.
