I always thought of it as an OR, because my definition of each differs from the author's. My definitions:
Introverts are drained by social activity.
Extroverts are energized by social activity.
Your type then drives your behavior, if you are near one of the ends of the spectrum. Extroverts will tend to be more outgoing because it is what energizes them. Introverts will tend to be less so, because they are drained by social activity and need time to recharge with solitary activities.
Introverts are drained by social activity. Extroverts are energized by social activity.
Your type then drives your behavior, if you are near one of the ends of the spectrum. Extroverts will tend to be more outgoing because it is what energizes them. Introverts will tend to be less so, because they are drained by social activity and need time to recharge with solitary activities.