Defining introversion and extroversion?

[ceecee]

My wife, the introvert, is self focused. When she is worried about something, she worries about how whatever she says or does will make others think or feel about her.

How is this any different than...

I want to make people react. That way I know I am alive. An inability to get a reaction out of others causes me to feel alone and non-existent.

this? It's all about getting the desired reaction or thought from other people about you.