The Psychology of Selves is the name Hal and Sidra Stone have given to the theoretical framework of their work. It simply refers to the study of the Selves, how they operate in each of us, how they operate in relationship, how they affect our decision-making, and how they relate to the evolution of consciousness.
This psychological model fits like a glove with the fooling model, The Stones has done extensive work in this field and have produced a wealth of information in books, DVD’s and CD’s; you can find out about them and their work here https://delos-inc.com/index.htm
I studied this method in Dorset with Peter Dellensen and Trilby Fairfax www.transformingdialogue.com
When I have more time I will write something of my experience of this work