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…

The article reports on a study investigating the comparative effects of immediate and delayed corrective feedback in learning the English past passive construction, a linguistic structure of which the learners had little prior knowledge. A total of 120 learners of English as a foreign language (EFL) from 4 intact classes at a Chinese middle school…

The main purpose of this article is to review studies that have investigated the effects of three types of planning (rehearsal, pre-task planning, and within-task planning) on the fluency, complexity, and accuracy of L2 performance. All three types of planning have been shown to have a beneficial effect on fluency but the results for complexity…

Reviews research that addresses how grammar can best be taught in terms of four theoretically motivated instructional options: (1) structured input; (2) explicit instruction; (3) production practice; (4) negative feedback. (Author/JL)

Investigated the effects of both pre-task and on-line planning on second language (L2) oral production. Results show that pre-task planning enhances grammatical complexity while on-line planning positively influences accuracy and grammatical complexity. Pre-task planners also produced more fluent and lexically varied language than the on-line…

Building on previous studies of the effects of planning on second language (L2) learners' oral narratives and drawing on Kellog's (1996) model of writing, this article reports a study of the effects of three types of planning conditions (pretask planning, unpressured on-line planning, and no planning) on 42 Chinese learners' written narratives…

A problem facing investigations of implicit and explicit learning is the lack of valid measures of second language implicit and explicit knowledge. This paper attempts to establish operational definitions of these two constructs and reports a psychometric study of a battery of tests designed to provide relatively independent measures of them.…

Explores ways of measuring implicit and explicit second language (L2) knowledge and examines the relationship between these measures and measures of general language proficiency. Factor analysis revealed a two-factor solution, reflecting a clear distinction between measures that incorporated a time constraint and those that did not. (Author/VWL)

This article reviews previous studies of the effects of implicit and explicit corrective feedback on SLA, pointing out a number of methodological problems. It then reports on a new study of the effects of these two types of corrective feedback on the acquisition of past tense -ed. In an experimental design (two experimental groups and a control…