“…ENGAGING IN EXTENSIVE, REPEATED, meaningful practice is an essential component of learning, facilitating the transition from initial reliance on declarative knowledge (e.g., explicit knowledge of a grammatical rule) to proceduralized and eventually automatized knowledge that can be accessed more efficiently under time pressured contexts such as spoken interaction (DeKeyser, , ; Lightbown, ; Segalowitz, ). Evidence suggests that practice that draws attention to linguistic features can be particularly useful for learning forms that have low salience, low communicative value, or complex relationships between first (L1) and second (L2) language (e.g., Doughty & Williams, ; R. Ellis, ; Kasprowicz & Marsden, ; Marsden, ; Marsden & Chen, ; McManus & Marsden, , , , ; VanPatten, ). However, whilst there has been extensive focus on the nature of practice required to facilitate L2 learning, an important remaining question concerns the amount and frequency of practice that is needed to maximize its effectiveness (DeKeyser, ; Rogers, ).…”