In this paper, I examined how the transition between the media and the audience affects the thesis statement. Based on the fact that different media characteristics of speech and writing embody the same content in different ways, the aspects of media transition and audience transition were examined for college students’ discussion scripts and essays after debating. The reason why the rebuttal in the discussion model was studied was that the rebuttal not only shows the dialogic argumentation well, but also reflects the media transition and audience transition at the same time when it is converted into monologic argumentation, which is writing.</br>First, the media transition from discussion to writing showed a difference in the amount of rebuttal terms. In the essays written after debating, we can see that the phenomenon of significantly reducing the existing rebuttal and replacing it with a new and interesting argument tends to give intellectual interest more advantage in the article written, compared to the special speaking situation of discussion. Second, as a result of examining the impact of audience transition on the argumentation strategy at the level of politeness, questioning, and communication, the politeness expression in discussion was removed from the writing and the argument strength increased, while the question aspect was diverse in discussion scripts using dialogic argumentation. In addition, analysis via Hyland’s ‘academic interaction model’ confirmed that audience transition is the cause of a different selection of boosters and hedges in the discussion script and essays after debating. In conclusion, we can say that the transition between the media and the audience has a certain effect on the argument development strategy.
