The impressions we form of others during initial interactions are powerful. These impressions are a product of various implicit theories--mental representations of people and actions. This article investigates the structure of implicit theories of listening used when forming impressions of others after an initial encounter. Specifically, three studies are reported that, together, iteratively build an empirical database of the attributes (what competent listening is) and behaviors (what competent listeners do) associated with effective listening in initial interactions. The results help construct an evidence-based, preliminary model that can be used to investigate the role and structure of implicit theories of listening. (Contains 9 tables, 1 figure and 8 footnotes.)