Encoding Motion Events During Language Production: Effects of Audience Design and Conceptual Salience.

We investigate the extent to which pragmatic versus conceptual factors can affect a speaker's decision to mention or omit different components of an event. In the two experiments, we demonstrate the special role of pragmatic factors related to audience design in speakers' decisions to mention conceptually "peripheral" event components, such as sources (i.e., starting points) in source-goal motion events (e.g., a baby crawling from a crib to a toybox). In particular, we found that pragmatic factors related to audience design could not only drive the decision to omit sources from mention, but could also motivate speakers to mention sources more often than needed. By contrast, speaker's decisions to talk about goals did not appear to be fundamentally driven by pragmatic factors in communication. We also manipulated the animacy of the figure in motion and found that participants in our studies treated both animate and inanimate source-goal motion events in the same way, both linguistically and in memory. We discuss the implications of our work for message generation across different communicative contexts and for future work on the topic of audience design.