Dr. Smith, I think this is an excellent list. I agree with all your "categories". I would add three more that I believe are worthy of our collective consideration:

1. Attachment theory and therapeutic applications: While therapy relationship gets at one aspect of this, the proverbial "elephant" is much larger than that "elephant's tail". I can't begin to cite the research here, but there is lots of it.

2. Systems thinking: This includes "internal systems" and "external systems", and the relationship between the two. To look at mind/body (not just mind) as separate from "environment", and systemic intra- and inter-relationships, seems like an important omission.

3. Multiplicity of mind/body and dissociation: The mind/body (they are not separate) is always multiple, and of course I do not mean Dissociative Identity Disorder. This multiplicity model of mind helps therapists understand how the same person can think/feel/behave one way, and at other times think/feel/ behave in a very different way, with or without awareness of their inconsistency or incoherence, and further how this can result in problems people bring to therapy. Along with "typical multiplicity" it is important to understand structural dissociation, that is where multiplicity leads to one part of self (mind/body) having little to no awareness of another part of self (mind/body).

4. Trauma: This category includes many you have already listed, including emotion, affect regulation, learned fear and memory reconsolidation, etc. However, to leave out this overarching category, and the vast research into trauma and brain/mind/behavior/health relationships, seems like an important oversight.

I wonder what you think about my additions?