AbstractThe roles of interaction have been studied for several decades. Recent studies have turned to investigate “the details of which components of interaction might be more or less effective in which contexts with which learners” (Loewen, Shawn & Masatoshi Sato. 2018. Interaction and instructed second language acquisition. Language Teaching 51(3). 285–329: 286). This case study, based on three unstructured interactions outside the classroom between two L2 Mandarin Chinese learners, investigates the learning opportunities these interactions brought about in terms of helping them to increase in control over forms that had already been encountered inside the classroom. Using the concept of the language-related episode (Swain, Merrill & Sharon Lapkin. 1998. Interaction and second language learning: Two adolescent French immersion students working together. The Modern Language Journal 82(3). 320–337), this study sets focus on learning opportunities for lexis- and grammar-related items. It finds learning opportunities arise as the two peers negotiate for meaning motivated by the need to comprehend, strive to use the L2 to express/co-express themselves, and improve their form through the other’s feedback. In addition, lexis-related learning is found to be very positive in this study. The dictionary played an indispensable role in facilitating the learners when they encountered lexis-related issues. Further, it enabled the learners to learn new vocabulary when driven by communicative needs. In comparison, the grammar-related learning is found to be relatively complicated. And the fact the learners had nowhere to resort to concerning grammatical issues attributed to it. In terms of the different types of interactions, compared to learning through negotiation for meaning and feedback, output and co-construction/collaboration were found to be most productive in promoting the learning.
Urban Air Quality Modeling Using Low-Cost Sensor Network and Data Assimilation in the Aburrá Valley, Colombia