Selection-based (SB) verbal behavior, in most general terms, consists of selecting stimuli from an array, which presumably has some effect on a listener. Topography-based (TB) verbal behavior consists of responses with unique topographies (e.g. speaking, signing, writing) which is also presumed to have some effect on a listener. This article reviews research examining the nature of these two types of verbal behavior. Overall, TB verbal behavior appears to be more easily acquired and may also function to mediate some SB verbal behavior.Researchers are in the process of clarifying the differences between selection-based and topography-based verbal behavior, as initially specified by Michael (1985) and expanded on by Cresson (1994) and Stratton (1992). The purpose of this article is to provide an overview of these differences, then summarize the research which has been conducted in this area.Topography-based (TB) verbal behavior consists of making a response with a unique form or topography (e.g., saying "What time is it?" or manually signing the same). The resulting stimulus from such a behavior presumably affects the listener in an appropriate manner. Common examples of topography-based verbal behavior include speaking, signing (as with the sign language of the deaf), and writing.Contrast this with selection-based (SB) verbal behavior, which consists of pointing to a stimulus, or series of stimuli, arranged in an array. The listener, watching which stimuli are pointed to, responds in an This review was part of the first author's dissertation submitted in partial fulfillment of a Doctor of Philosophy degree at Western Michigan University.