Dialogic Engagement in Scientific Discourse: An Appraisal Analysis of Discussion Sections by Arab L2 and Native English Writers

The discussion section of a research article is a critical site of persuasion, where writers must strategically negotiate claims, credibility, and collegiality. This study investigates how cultural and linguistic backgrounds shape this delicate rhetorical act by conducting a contrastive analysis of dialogic engagement in scientific discussions. Employing Martin and White’s (2005) Appraisal Theory, specifically the Engagement Framework, the researcher analyzed a specialized corpus of 40 research articles in Molecular Biology and Organic Chemistry, written by Arab L2 and Native English (NE) writers. The analysis reveals a stark, statistically significant divergence in the frequency and distribution of these resources: Arab L2 writers rely predominantly on contractive resources (e.g., show, demonstrate, however) to project authority and present findings as definitive, whereas NE writers favor expansive resources (e.g., may, suggest, possibly) to open dialogic space, model epistemological caution, and invite reader alignment. This pattern reveals two distinct models of persuasion: one prioritizing authoritative knowledge claims, the other emphasizing reader collaboration. Consequently, the findings argue against simplistic pedagogical rules, advocating instead for “rhetorical agility” to prepare L2 scholars for international scientific discourse.