If I knew what an extrovert, or introvert are I might be able to answer. People in my experience are not one or the other, and psychologists it seems tend to agree.
I prefer to group people if I must into those who take a subjective view of the world and those who are more objective. My younger sister is faith based. I don't mean faith as in a follower of dogma, I mean if she views the world in a particular way and she has great difficulty in understanding that others may not see the world the same way as she does. There is a difference to be noted here in people who don't agree with a view and people who do not have the capacity to believe that there is any other view but theirs.
With my younger sister, this is compounded by mental health issues, creeping alcoholism and what gets described these days as a lack of self esteem.
I'm not quite sure of exactly what this means either.
So, if you met her, she would seem to be very outgoing and outwardly friendly and might easily be mistaken as a confident, extrovert type. It is in fact a compensation mechanism. The extrovert bit is attention seeking. She sort of fades away if there is no input from the outside world. She doesn't have the mental stability or inner confidence to be/feel alone.
I'm much more evidence based in my world view and silence doesn't bother me.
It's not that I don't like to talk, as you can probably tell from my posts.

But, I'm not as input driven as my sister. I can construct a space in my head and live there quite contentedly. Being able to do things other than talk makes a lot of difference I think. My sister has no creative outlets and is mostly destructive.