It was through her own psychoanalysis that the author was struck by a realization of how much less important in life the external data are than are demands. Most psychological attempts to approach the "central" have been found not to be central, but rather "distal" (environmental) in character, with the major exception of psychoanalysis. Both central and distal aspects are necessary for a full description of personality. It is their interrelationship, rather than the peripheral-proximal relationships chiefly emphasized up to now, which should be studied. Whereas psychoanalysis has been asking "Which drive?" and general psychology has been asking "Which effect?", a unified psychology should ask ask "Which effect of which drive?" (PsycINFO Database Record (c) 2006 APA, all rights reserved)