Relationships between linguistic knowledge, linguistic awareness, and argumentative writing among upper elementary bilingual students

Argumentation is a critical genre of writing that elementary school students are expected to develop, but little is known about how different domains of language contribute to argumentative writing. To explore this, we identified two domains of language: linguistic knowledge (lexical, morphological, and syntactic skills) and linguistic awareness (ability to identify and manipulate discourse- and text-level features). We worked with 119 fourth and fifth grade Spanish- and Portuguese-English bilingual students in the Northeast and Mid-Atlantic regions of the United States. We asked whether students’ linguistic knowledge served as a direct predictor of argumentative writing, or as an indirect predictor of argumentative writing, mediated by linguistic awareness. We explored this question with two writing outcomes: students’ argumentation and counter-argumentation. Controlling for orthographic knowledge, essay length, and English learner status, structural equation modeling revealed that students’ linguistic knowledge predicted their argumentative writing indirectly through linguistic awareness, but not directly. Neither the direct nor indirect effects structural model predicted students’ counter-argumentation. Our results extend theory on school-related writing tasks by differentiating between linguistic knowledge and linguistic awareness in understanding bilingual students’ written argumentation, with implications for instruction.