Using a comparative rhetoric model, a study examined the discourse behavior of native speakers of American English conducting peer review discussions in English and that of native speakers of Chinese performing the same task in Chinese. Data are drawn from audiotape recordings of peer review discussions of eight college students, conducted in college writing classes. One of the discourse features demonstrated by the native speakers of Chinese in this study is co-construction, a discourse phenomenon of collaboration. However, there is considerable difference between individual participants in the frequency of this behavior. While co-construction has been evidenced in studies of English conversation, these native speakers of American English did not manifest similar interactional behavior in their peer review discussions. Contains 21 references. (Author/MSE)