A one-week period of talk-show broadcasts from a Salt Lake City radio station was recorded and transcribed, in order to characterize the patterns of interaction which emerged from the talk between the six radio hosts and their callers. The coding system used focused on content and relationship aspects of communication. Results indicated that when someone introduces new information, the most probable transition is to content extensions and from there to further extension or to positive reinforcement. Interaction varied among hosts, though a more controlled, experimental study is needed to control such variables as time of day and demographic characteristics of listeners. In general, hosts and callers supported one another; statements which disagreed or negatively reinforced previous statements constituted less than 1% of the interaction. (AA)