The Interpretation of Dreams by Sigmund Freud Chapter 4 Page 12

of reproduction. But this only indicates the way in which the psychic process is discharged in hysterical imitation; the way in which a psychic act proceeds and the act itself are two different things. The latter is slightly more complicated than one is apt to imagine the imitation of hysterical subjects to be: it corresponds to an unconscious concluded process, as an example will show. The physician who has a female patient with a particular kind of twitching, lodged in the company of other patients in the same room of the hospital, is not surprised when some morning he learns that this peculiar hysterical attack has found imitations.

He simply says to himself: The others have seen her and have done likewise: that is psychic infection. Yes, but psychic infection proceeds in somewhat the following manner: As a rule,