Sigmund Freud (1856­1939) was the Austrian neurologist who developed 
psychoanalysis. He used hypnosis and free association to discover 
repressed events and emotions in patients, often of a sexual nature. In 
1900 he published The Interpretation of Dreams , laying out the 
fundamental concepts of psychoanalytic treatment. Freud’s theories 
initially met with hostility, but eventually flourished in modified forms as 
a means of treating psychoses and neuroses. He is considered one of 
the great creative minds of the modern age.