https://en.wikipedia.org/wiki/Ronald_Fairbairn
An Outline of Fairbairn's Structural Model[edit]
Fairbairn's 1944 paper introduced the psychoanalytic community to his alternative view of the structure of the human personality which he saw as being the result of dissociation of intolerably frustrating experiences with the individuals parents. Before he introduced his model he commented on the ability of one structure (or sub-self) to repress another sub-self, and in so doing, become the executive (dominant) ego structure.
The ability of one ego state to repress another ego state is the central dynamic of the unconscious in Fairbairn's model. It accounts for the shifting of ego states (or self-states) that can occur when for instance, the central ego interacts with someone who resembles (or seems to resemble) the rejecting object of their childhood. The central ego is instantly repressed and the angry, combative antilibidinal ego reappears, and becomes the dominant or "executive ego". His whole mood and experience of the world shifts and he is ready to defend himself and taunt the more powerful rejecting object. Conversely the central ego may be replaced by the libidinal ego if someone in his environment promises praise and advancement (or he imagines this to be so), and he begins to slavishly seek the individuals approbation. Fairbairn saw psychopathology as an endless series of shifting ego states which were originally designed to protect the individual from the harsh realities of their childhood, but in adulthood they disrupt the individual because of the incomplete views of themselves and the incomplete views of people around them.
Fairbairn's 1944 structural theory emerged from his careful and detailed analysis of a patient's dream (Fairbairn, 1952, pp. 95–106).[1] He observed that the patient had separate views of herself and of her significant others that could be understood as part-selves and part objects. Fairbairn saw that there were three pairs of structures- one pair was conscious and the other two pairs were largely unconscious.The fundamental position of Object Relations Theory is that for every developing self there has to be a object to whom it relates, thus every pair of structures contains a version of self paired with a version of the object (other person) to whom the self structure was relating. The two conscious structures are The Central Ego (the self structure) and its relationship to the Ideal Object (the "good object" other) , and two pairs of unconscious structures. The first pair of (mostly unconscious structures) are The Antilibidinal Ego (the self structure, which Fairbairn originally called the "internal saboteur") is an internal representation of the neglected, humiliated and enraged child in a relationship to the Rejecting Object, (the object structure) which is an internal representation of the abusive parent. The second pair of unconscious structures are The Libidinal Ego (the self structure) which is the child's fantasy of the good parent whom he wishes for and his relationship to the Exciting Object (the object structure) which is a fantasy representation of the loving parent who offers him hope for the future. In Fairbairn's model the need of the child for a positive parent is so intense that the deprived child creates a "good" parent out of fantasy and hope. This second vision of the parent (mis)perceives the parent as filled with the potential of love. This vision of the parent is built out of the occasional positive or tender interaction that the child has experienced with his mostly rejecting parents. The attachments of these two mostly unconscious selves to these part objects constitutes what Fairbairn defined as an attachment to the Bad Object. The Bad Object has two facets: the antilibidinal ego argues with and complains about its mistreatment to the rejecting object in an attempt to reform it, while the libidinal ego seeks ways to find out how to please the exciting object which promises it love which is always out of reach. Neither part-self (antilibidinal ego, libidinal ego) is willing to give up their quest, and neither part object (rejecting object and exciting object) is willing to concede defeat, and neither of the object representations (rejecting or exciting) is willing to give either of the child's two selves any satisfaction.
See also
http://www.columbia.edu/~rr322/FAIRBAIRN.html