Model text as corrective feedback in L2 writing: the role of working memory and vocabulary size

Recent research highlights model texts as a form of written corrective feedback (WCF) for enhancing L2 writing skills. This study, conducted at a South Asian university, assessed the impact of model texts on the argumentative writing skills of 71 undergraduate ESL students. Divided into treatment and control groups, assessments at various stages employed an analytic rubric and CALF metrics (complexity, accuracy, fluency, lexical richness). Additionally, regression analysis was used to gauge the effect of working memory capacity (WMC) and vocabulary size on the success of the method. The findings revealed that the treatment group exhibited significant improvements, particularly in vocabulary use and structural aspects of their writing. Both WMC and vocabulary size were found to influence the efficacy of model texts. This study underscores the potential of model texts in WCF and highlights the role of individual learner attributes in determining its effectiveness.