(Freud 1920)

'When first discussed as "the process...which plays the largest part in our understanding of...other people"(Freud, 1920 p. 110, fn.2), a scientifically valid method of observation by which psychiatrists could gain understanding of the inner world of their patients, it was highly suspect." (OHARA 1997

)

Freud, S. (1920). Group psychology and the analysis of the ego. Standard Edition, 18, 110.