Erving Goffman, the linguist George Lakoff, the cognitive scientist Steven Pinker, the sociolinguist Deborah Tannen, and the anthropologist Anna Wierzbicka.
Note: Look these up
Note: now this looks interesting, maybe scary too :-)
Emotions inform thoughts.
Note: This is one of the best books I've read in ages.
the more the two people are engaged with one another, the more closely their function words match.
Note: Function words and level of engagement.