According to Sandler and Rosenblatt, the representational world exists between the ego and the outside world as a buffer of introjected and internalized objects, part objects, and symbols. It includes experiences with significant objects and information of the person's own body. As a storehouse of past experience, it is useful to the ego in terms of its perception and evaluation of the outer world. The ego's sense of well being and affective tone would be a function of the degree of consonance between ego activities and the historical framework within the representational world. The interaction of ego and representational world determines psychic function. In sum, what is proposed is the consideration of a 'schema of psychic space', the representational world, which is a 'field of function of a construct called ego, closely related to it genetically and developmentally but distinguished by a factor of consciousness'.