A style of behavior that one is born with, composed of an intellectual style and emotional style, and which can grow into a full, well-rounded personality over the lifetime. It is the raw material of identity, and gives us tendencies to communicate a certain way, to have certain dominance in particular psychological resources, to feel fulfilled in certain ways, which differ from the other three types of temperament.

It is an average of our emotional and intellectual tendencies, and is like our "common denominator" of behavior, the style to which we revert, regress, or fall back on to rely on in times of stress.

It tells us whether we tend to dive into book learning, or people, or new places, new associations or other demographic reliances when under stress.