Abstract

From the viewpoint of information transaction models in linguistic pragmatics, expressions of linguistic politeness (LP) induce costs upon speakers. That speakers regularly “pay" such cost is what formal models of LP typically explain either by individual-level _strategic_ considerations (e.g., the speaker’s aim of avoiding a face-threat to the hearer) or community-level _conventional_ considerations (e.g., the use of LP as a relation-acknowledging device). Because these explanations are compatible, as each relates to the speaker and hearer’s social relation, we combine them into a single game-theoretical model enriched by three types of social network structures (ring-shaped, star-shaped, and complete). Using simulation studies of (single and repeated) speech acts of requesting, we let the degree of LP be determined by (i) the degree of social imposition associated with a request, (ii) the number of interlocutors’ past interactions, and (iii) the relative importance of strategic and conventional considerations. The greatest average optimal degree of LP is obtained in the star-shaped network, which intuitively corresponds to a power-centered, hierarchical society.