The present meta-analysis investigated the effects of recasts along with a number of moderating variables on L2 development by meta-analysing the results of 24 primary studies. The findings revealed an overall medium effect size for the effectiveness of recasts (g = 0.70, 95% CI = 0.48-0.93). Furthermore, the findings indicated that recasts are…

This article presents a review of research that has investigated ways of measuring implicit and explicit knowledge of a second language (L2), focusing on grammar. It begins by defining implicit and explicit knowledge in terms of a distinguishing set of criteria. Two ways of investigating implicit knowledge are discussed -- through experimental…

This study compares the effect of ZPD feedback with explicit feedback on accuracy in second language (L2) writing. It also examines the effect of focused vs. unfocused ZPD feedback on L2 writing development during teacher-student tutorial sessions. Four participants wrote five persuasive essays and were provided with ZPD or explicit feedback…

Among focus-on-form studies, oral corrective feedback (CF) has probably received the greatest attention. The majority of studies in this area appear to support a positive role for oral CF in improving interlanguage development. However, theorists adopting a nativist view of second language acquisition continue to question its effectiveness. The…

This study examines the effects of mixed oral corrective feedback (CF) on L2 learners' oral production accuracy. Twenty-four EFL learners from two intact classes in a Turkish university participated in the study. The two classes were randomly assigned to be an experimental and a control group and completed five communicative tasks. The learners in…

Collaborative dialogue has been seen as an important aspect of L2 learning. However, the extent to which collaborative dialogue contributes to learning depends very much on the context in which it takes place. Informed by a sociocultural perspective of learning, this study investigated the nature of the collaborative dialogue between complete…

The current study investigates the effects of dynamic and non-dynamic oral corrective feedback in response to learners' errors on English as a foreign language (EFL) learners' English wh-question development over three treatment sessions. Sixty-eight EFL learners were assigned randomly to one of two experimental conditions that received either…

A considerable number of studies on focus-on-form instruction, corrective feedback and uptake have been carried out in the field of second language acquisition (SLA) research over the last two decades. These studies have investigated the above-mentioned concepts from different perspectives, in a number of different contexts and in a number of…

This study was designed to investigate the effects of incidental unfocused prompts and recasts on improving English as a foreign language (EFL) learners' grammatical accuracy as measured in students' oral interviews and the Test of English as a Foreign Language (TOEFL) grammar test. The design of the study was quasi-experimental with pre-tests,…

Teachers, in particular those who operate in communicatively oriented classrooms, frequently use recasts (i.e. reformulations) when interacting with students. Research has nevertheless shown that, as a corrective feedback strategy, recasts are the least effective, particularly in terms of helping students to recover from grammatical errors. One…

Foreign language teachers have long been frustrated by learners' written errors. Traditional approaches to the problem--grammar instruction and error feedback--when used alone are not effective. Explicit instruction in proofreading provides a missing link. When instruction in proofreading is embedded in grammar instruction and when learners use…

This article reports on a study which investigated the effects of correction of learners' grammatical errors on acquisition. Specifically, it compared the effects of timing of correction (immediate versus delayed correction) and manner of correction (explicit versus implicit correction). It also investigated the relative effects of correction of…