A New Approach to Psychology.

Sigmund Freud, an Austrian Jewish psychiatrist who fashioned a dynamic theory of psychology of human behavior based on the workings of the unconscious mind, achieved world prominence by virtue of his highly publicized visit in September 1909 to Clark University in Worcester, Massachusetts. Clark had built a strong psychology program under president and leading psychologist G. Stanley Hall, who invited Freud to lecture as part of the festivities celebrating the twentieth anniversary of the university's founding. Freud's trip to Clark was his only trip to the United States.

Psychoanalysis.

Freud had first set forth his concepts of psychoanalysis in his famous book On the Interpretation of Dreams, published in German in 1900. He explained how conscious thoughts — particularly those that are unpleasant or threatening — are repressed, only to reappear in a person's unconscious mind where they are...