All forms of interpersonal communication involve gaining knowledge of others. Varieties of interpersonal communication theories, strategies, and aims coexist. These include social penetration theory, or how we gain information about others; norm of reciprocity, or how individuals reveal themselves to others (dyadic effect or level of revealed intimacy); and compensation (one's behavior is countered by another, as in facial expressions; variations on this theory are expectancy violation, arousal labeling theory, discrepancy arousal theory, and cognitive valence theory), among many others. Depending on the knowledge gained, we interact with people ...