Freud's work can be divided in four major periods*:

1. The exploration of neurosis, from the inception of practice (1886) until the "Studies on Hysteria" -1895.

2. Self-analysis - 1895-1899.

3. Id psychology, in which was elaborated the first system of psychoanalytic psychology - 1900-1914.

4. Ego psychology, involving a considerable extension and elaboration of the earlier ideas, lasting from 1914 until 1939.

• Read also: > Bibliography by chronological order
                > Bibliography by alphabetical order