This first period, called formerly the paranoid position, and here renamed the paranoidschizoid position… had been only broadly outlined… as a contrast to the depressive position. Melanie Klein now sets out the characteristics of the early ego, the form of its object relations and anxieties
This explanatory note identifies the 1946 paper as the definitive source for the term’s renaming and its first systematic elaboration of early-ego structure, object relations, and schizoid mechanisms including projective identification.
, Envy and Gratitude and Other Works 1946-1963, 1957thesis