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1879: Wilhelm Wundt - first experimental psychology lab

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1879: Wilhelm Wundt - first experimental psychology lab

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1886: Sigmund Freud - begins therapy in Vienna, Austria

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1886: Sigmund Freud - begins therapy in Vienna, Austria

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1890: William James - publishes "Principles of Psychology."

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1890: William James - publishes "Principles of Psychology."

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1892: American Psychological Association (APA) is formed.

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1892: American Psychological Association (APA) is formed.

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1896: William James and John Dewey publishes "The Reflex Arc Concept in Psychology." An article that promotes functionalism. 

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1896: William James and John Dewey publishes "The Reflex Arc Concept in Psychology." An article that promotes functionalism. 

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1898: Edward Thorndike develops the Law of Effect. 

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1898: Edward Thorndike develops the Law of Effect. 

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1900: Sigmund Freud published "Interpretation of Dreams."

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1900: Sigmund Freud published "Interpretation of Dreams."

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1901: The British Psychological Society is formed. 

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1901: The British Psychological Society is formed. 

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1904: Marie Calkins is elected the first female president of APA.

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1904: Marie Calkins is elected the first female president of APA.

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1905: Alfred Binet and Theodore Simon develop the IQ test.

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1905: Alfred Binet and Theodore Simon develop the IQ test.

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1906: Ivan Pavlov publishes his findings on classical conditioning. 

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1906: Ivan Pavlov publishes his findings on classical conditioning. 

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1911: Edward Thorndike publishes "Animal Intelligence." Leads to the theory of operant conditioning. 

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1911: Edward Thorndike publishes "Animal Intelligence." Leads to the theory of operant conditioning. 

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1912: Max Wertheimer publishes "Experimental  Studies of the Perception of Movement."

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1912: Max Wertheimer publishes "Experimental  Studies of the Perception of Movement."

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1913: John B. Watson publishes "Psychology as the Behaviorist Views."

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1913: John B. Watson publishes "Psychology as the Behaviorist Views."

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1920: Watson and Rosalie Rayner publish research on classical conditioning of fear. The study of Little Albert.

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1920: Watson and Rosalie Rayner publish research on classical conditioning of fear. The study of Little Albert.

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1932: Jean Piaget becomes the foremost cognitive theorist for his work "The Moral Judgment of the Child."

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1932: Jean Piaget becomes the foremost cognitive theorist for his work "The Moral Judgment of the Child."

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1954: Abraham Maslow publishes "Motivation and Personality." 

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1954: Abraham Maslow publishes "Motivation and Personality." 

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1958: Harry Harlow publishes "The Nature of Love."

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1958: Harry Harlow publishes "The Nature of Love."

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1961: Albert Bandura conducts Bobo doll experiment. 

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1961: Albert Bandura conducts Bobo doll experiment. 

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1963: Albert Bandura describes the concept of observational learning to explain aggression. 

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1963: Albert Bandura describes the concept of observational learning to explain aggression. 

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1974: Stanley Milgram publishes "Obedience to Authority." 

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1974: Stanley Milgram publishes "Obedience to Authority." 

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1991: Steven Pinker publishes an article about how children acquire language. 

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1991: Steven Pinker publishes an article about how children acquire language. 