This data-driven study framed in the interactionist approach investigates the influence of social graph topology and peer interaction dynamics among foreign exchange students enrolled in an intensive German language course on second language acquisition (SLA) outcomes. Applying the algorithms and metrics of computational social network analysis…

This study examines the putative benefits of explicit phonetic instruction, high variability phonetic training, and their effects on adult nonnative speakers' Mandarin tone productions. Monolingual first language (L1) English speakers (n = 80), intermediate second language (L2) Mandarin learners (n = 40), and L1 Mandarin speakers (n = 40) took…

This special issue contains reports of research on a variety of variables that are hypothesized to have an impact on how practice affects language learning. This includes spacing of practice opportunities, the provision of feedback, training working memory, and oral versus written input. Each study is complex and clearly contextualized within the…

Comprehension of many types of texts involves constructing meaning from text and pictures. However, research examining how second language (L2) learners process text and pictures and the relationship with comprehension is scarce. Thus, while verbal input is often presented in written and auditory modes simultaneously (i.e., audio of text with…

This article reports the results of the first longitudinal study that systematically investigates the acquisition of verb agreement by hearing learners of a sign language. During a 2-year period, 14 novel learners of Sign Language of the Netherlands (NGT) with a spoken language background performed an elicitation task 15 times. Seven deaf native…

This study examined how mode of input affects the learning of pronunciation and form-meaning connection of second language (L2) words. Seventy-five Japanese learners of English were randomly assigned to 1 of 3 conditions (reading while listening, reading only, listening only), studied 40 low-frequency words while viewing their corresponding…

Two studies examined the role of input distribution in English construction learning, by child learners from a Mandarin first-language background, and the extent to which phonological short-term memory and awareness predicted such learning. In the first study, 4th-grade students of Mandarin Chinese (N = 121) learned the English object-cleft…

We examined the role of modality in learning second language (L2) grammar and forming implicit (unconscious) and explicit (conscious) knowledge. To this end, we isolated the effects of the physical medium of input (i.e., aural or visual) from those of the presentation method (i.e., word-by-word or simultaneous). We also explored the role of test…

This article analyzes the instructed learning of the English article system by second language (L2) learners. The Competition Model (MacWhinney, 1987, 2012) was adopted as the theoretical framework for analyzing the cues to article usage and for designing effective computer-based article instruction. Study 1 found that article cues followed a…

Within limited-input language classrooms, understanding the effect of distribution of practice (spacing between practice) on learning is critical, yet evidence is conflicting and of limited relevance for young learners. For second language (L2) grammar learning, some studies reveal advantages for spacing of 7 days or more, but others for shorter…

This study explores the impact of textual input enhancement on the noticing and intake of English vowels by Arabic L2 learners of English. Arabic L1 speakers are known to experience "vowel blindness," commonly defined as a difficulty in the textual decoding and encoding of English vowels due to an insufficient decoding of the word form.…

This study investigated the effects of input-based and output-based practice on the development of accuracy and speed in recognizing and producing request-making forms in L2 Chinese. Fifty American learners of Chinese with intermediate level proficiency were randomly assigned to an input-based training group, an output-based training group, or a…

This article examines the coordination of speech and gesture in teachers' definition talk, that is, vocabulary explanations addressed to language learners. By analyzing one ESL teacher's spoken definitions, the study demonstrates in the details of the unfolding talk how a teacher crafts and choreographs his definitions moment by moment, while…

This study investigates whether practice with computer-administered feedback in the absence of meaning-focused interaction can help second language learners notice the corrective intent of recasts and develop linguistic accuracy. A group of 218 beginning Anglophone learners of Spanish received 1 of 4 types of automated feedback (no feedback,…

Many second language acquisition researchers (e.g., Doughty & Williams, 1998; R. Ellis, 2007; Long, 1996, 2007; Lyster, Lightbown, & Spada, 1999; Russell & Spada, 2006) have advocated the use of negative feedback to promote learner noticing of errors and the internalization of correct forms. At the same time, the true efficacy of this practice is…