Yes, the concepts of the container-contained and the holding environment are related to Kohut's concept of selfobject in psychoanalytic theory.
Kohut's theory of self-psychology emphasizes the importance of the self and self-experience in psychological development. In self-psychology, a selfobject is an object that the individual experiences as an extension of the self. Selfobjects provide psychological functions that are essential for the development of a cohesive sense of self, such as mirroring, idealization, and twinship.
The concept of the selfobject can be seen as related to the concept of the holding environment in Winnicott's theory, as both emphasize the importance of a supportive and nurturing environment for the development of the self. In addition, the concept of the container-contained in Bion's theory can be seen as related to the concept of selfobject, as the therapist in the container-contained relationship acts as a selfobject, providing psychological support and facilitating the development of the client's sense of self.
In all three concepts - selfobject, holding environment, and container-contained - the focus is on the importance of the interpersonal context in shaping individual experience and behavior, and on the mutual influence and co-creation of experience within the interpersonal space between individuals.
