Of all Freud's writings, Bion was most deeply influenced by "Formulations on the Two Principles of Mental Functioning" (1911), and the author asserts that much of Bion's major theoretical thinking may be seen as an elaboration of this paper. Bion's introduction of the concept of alpha function, which "may be regarded as a structure" (Bion 1962, p. 26), constitutes what the author calls "Bion's ego psychology". A clinical implication of Bion's ego psychology is a focus upon the unconscious interaction between the analyst's and the patient's communicating alpha functions. Clinical material from the analysis of an adolescent is offered to illustrate the author's points.

The author contends that, following Freud, trauma may be viewed as a disruption of the ego's 'protective shield' and that a central factor of this shield is an internalized relationship to a thinking-containing mother. Severe trauma destroy this inner connection, resulting in the reversal of a-function and the establishment of a rigid traumatic organization (ss-screen) that brings coherence to the shattered psyche. However, this is an 'organized chaos' in which concrete forms of thinking predominate. The patient's ability to think, dream and imagine is significantly curtailed and she is consequently locked in a traumatic world from which she is unable to evolve. He offers a detailed case history to illustrate these points and the vital role the analyst's imaginative capacities play in the analysis of such individuals. Finally, he addresses the development of the capacity to represent the trauma, starting with primitive, often somatically encoded experiences, and evolving toward the capacity for historicization.

This paper has traced Bion's discovery of alpha function and its subsequent elaboration. His traumatic experiences as a young tank commander in World War I (overlaid on, and intertwined with, childhood conflicts) gave him firsthand exposure to very painful emotions that tested his capacity to manage. Later, in the 1950s, after his analysis with Melanie Klein and marriage to Francesca Bion, he undertook the analysis of psychotic patients and learned how they disassembled their ability to know reality as a defense against unbearable emotional truths in their lives. This led Bion to identify an aspect of dreaming that was necessary in order for reality experience to be given personal meaning so that one may learn from experience. Simultaneous with working out this new theory of dreaming, Bion also revisited his World War I experiences that had remained undigested and all these elements coalesced into a selected fact - his discovery of alpha function. In subsequent writings, Bion explored the constituent factors of alpha function, including the container/contained relationship, the PS↔D balance, reverie, tolerated doubt and other factors which I have termed the 'Constellation for Thinking'.

The use of the psychoanalyst's subjective reactions as a tool to better understand his/her patient has been a central feature of clinical thinking in recent decades. While there has been much discussion and debate about the analyst's use of countertransference in individual psychoanalysis, including possible disclosure of his/her feelings to the patient, the literature on supervision has been slower to consider such matters. The attention to parallel processes in supervision has been helpful in appreciating the impact of affects arising in either the analyst/patient or the supervisor/analyst dyads upon the analytic treatment and its supervision. This contribution addresses the ways in which overlapping aspects of the personalities of the supervisor, analyst and patient may intersect and create resistances in the treatment. That three-way intersection, described here as the triadic intersubjective matrix, is considered inevitable in all supervised treatments. A clinical example from the termination phase of a supervised analysis of an adolescent is offered to illustrate these points. Finally, the question of self-disclosure as an aspect of the supervisory alliance is also discussed.

Following a brief review of Freud's writings on trauma, the author discusses relevant theories of Bion, and in particular the concepts of the alpha function and the beta screen. A clinical example is presented in which the patient's relatively recent trauma in adulthood had become fused with prior related experiences, leading to a propensity for repeated enactments in analysis and a failure to learn from experience. Drawing on the analyst's alpha function, the patient was gradually able to use mentalization to transform her rigidly structured traumatic organization. The author highlights the roles of dreams/dream associations and of screen memories in the patient's analysis.