The following is a quote from "What Type Am I?", by Renee Baron.
(Notice how she includes THINGS, not just people and activites)Those who prefer Extraverting get their energy from the outer world of people, activities, and things.
Those who prefer Introverting get their energy from their inner world of ideas, impressions, and thoughts.
The key difference between Extraversion and Introversion is not whether someone talks a lot or not, but whether they get energy from the OUTER WORLD or their own INNER WORLD.
The next important point is that what people DO with that energy varies.
Extraverts get energy from the outside world.
Sometimes Extraverts pour that energy into more talking and socializing, and
sometimes they pour it into a solitary activity.
Introverts get energy from their own inner world.
Sometimes they pour that energy into more solitary activities, and sometimes they pour that energy into talking and socializing.
In conclusion, you can not tell whether someone is an Extravert or an Introvert solely on the basis of how much they talk or socialize.
It would be nice if it were that simple, but understanding personality type goes beyond looking at the surface of things.
(By the way---
The original title of this post was "E vs. I Made Simple"
I changed the title because I decided it was innapropriate.
My point was not to provide a way to determine whether someone is E or I.
My point was that the amount of talking and socializing one does is not a reliable indication of E or I.)