Cain, Susan. "Quiet: The Power of Introverts in a World That Can't Stop Talking." Broadway. New York. 2013.
Review: Reading this book led me to some things of interest for training and practice but more importantly the SD aspects. It deals with how we are programmed by both genes and environment. It deals with whether a person is either a high-reactive or low-reactive person. It deals with introversion and extroversion along with the amygdala storage and later influential abilities (lifetime of stored associations).
It must be understood that these influences matter and that one can train themselves to overcome them but occasionally it does not work leaving you subject to those stored associations. What the ? am I talking about?
Well, you will have to study the material yourself to get the full picture and idea behind this post. I know instinctively that this matters and it may help sensei work with practitioners to achieve the best results possible in their training and practice toward self-defense. Knowing how this entire model works within those persons be they of an introverted or extroverted nature (and all levels in between) or of high-reactive or low-reactive nature will tell you how you can possible gear things toward greater understanding and ability in a SD situation.
I highly recommend this book to everyone, especially those who teach be it martial arts or any life discipline.