What are the scientific reasons behind someone talking with him/herself? Is it a disorder of some kind? By "talking" I also mean writing to self.
By self-talk I mean a person (P) is talking with self in a Q&A format. For example-
PQ: Hey, what happened? PA: I'm not liking it here. PQ: Why, what is it that you are not liking it? PA: I don't like the attitudes of people around here. Everyone thinks he's very smart ... PQ: But why is it affecting you?
and so on ..
The above kind of dialogue can either be spoken or written. Usually, one party asks another about their problems/feelings and suggests solutions / gives instructions to other party.