[The Wednesday Psychological Society]
In 1902, probably on the initiative of Stekel, who had been his patient, Freud invited four men (Stekel, Adler, Kahane and Reitler) to meet him in order to discuss his work, and they formed what
they called the Wednesday Psychological Society, since they met every week on that day.
By 1908, there were 14 members and the name was changed to the Vienna Psychoanalytical Society; it was
in this year that Ferenczi joined it.
Besides the members, there were some guests who later became important for psychoanalysis movement such as Eitingon, Jung, Abraham and Jones, each of whom later
became president of the International Association.
Compiled from http://www.ipa.org.uk.