Effects of Corrective Feedback on the Production of Complex and (Non)Transparent Morphosyntax
Although there is evidence that corrective feedback (CF) is beneficial for the learning of L2 morphosyntax in instructed contexts, the effects of oral feedback for the learning of complex forms displaying opaque form-meaning relationships have remained largely unexplored. In this quasi-experimental study 44 adult L2 learners of Italian were pseudo-randomly assigned to a recast, an elicitation and a control group and compared on the accuracy in the oral production of passato prossimo, a past tense construction including auxiliaries and participles displaying morphemes with different degrees of opacity. Posttest and delayed posttest gains in the overall accuracy of the construction were significant for recasts (p < .05, d = 1) and elicitations (p < .01, 1.2 ≥ d ≥ 1.5). However, recast gains were significant for both transparent and opaque forms and their syntactic domain included both participle and auxiliary morphology, whilst elicitation gains focused on transparent forms and appeared to have a narrower syntactic focus. These results provide evidence in support of the view that recasts are beneficial for the acquisition of complex forms and indicate that more research is needed to shed light on how implicit and explicit instructional strategies are best effective depending on the transparency of the linguistic target.