“…Naming is one of the three types of speaker-as-own-listener behaviors that have been identified experimentally: (a) Naming (e.g., Greer, Stolfi, Chavez-Brown, & Rivera-Valdes, 2005), (b) self-talk involving rotating speaker and listener responses aloud (e.g., Lodhi & Greer, 1989), and (c) correspondence between saying and doing (e.g., Paniagua & Baer, 1982;Rogers-Warren & Baer, 1976 Each of these types of speaker-as-ownlistener repertoires are important and probably interrelated, but in this paper we focus on Naming as a key developmental stage. We argue that when children acquire Naming, their language expands exponentially from incidental observation.…”