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This paper suggests six areas of vocabulary research which the author believes would be fruitful for future research. They include (1) developing a practical model of vocabulary acquisition, (2) understanding how vocabulary knowledge develops from receptive to productive mastery, (3) getting lexical teaching/learning principles into vocabulary and language textbooks, (4) exploring extramural language exposure and how it can best facilitate vocabulary acquisition, (5) developing more informative measures of vocabulary knowledge, and (6) measuring fluency as part of vocabulary competence. Nine tasks are suggested for how to research these six research directions, with advice on research design and how to set about carrying out the tasks.

This study investigated incidental learning of single-word items and collocations through listening to teacher talk. Although there are several studies that have investigated incidental vocabulary learning through listening, no intervention studies have explicitly investigated the extent to which listening to teachers in a classroom context might contribute to vocabulary learning. The present study fills this gap. Additionally, the study explored the relationship between vocabulary learning gains and two factors: frequency of occurrence and first language (L1) translation. A meaning-recall test and a multiple-choice test were used to evaluate learning gains. The results indicated that (a) listening to teacher talk has potential to contribute to vocabulary learning of both single-word items and collocations, (b) using L1 translation to explain target word meanings contributed to larger gains on the immediate posttest, (c) frequency of occurrence was not a significant predictor of incidental vocabulary learning. (Verlag).

There is current research consensus that second language (L2) learners are able to adequately comprehend general English written texts if they know 98% of the words that occur in the materials. This important finding prompts an important question: How much English vocabulary do English as a second language (ESL) learners need to know to achieve this crucial level of known-word coverage? A landmark paper by Nation (2006) provides a rather daunting answer. His exploration of the 98% figure through a variety of spoken and written corpora showed that knowledge of around 8,000–9,000 word families is needed for reading and 6,000–7,000 for listening. But is this the definitive picture? A recent study by van Zeeland & Schmitt (2012) suggests that 95% coverage may be sufficient for listening comprehension, and that this can be reached with 2,000–3,000 word families, which is much more manageable. Getting these figures right for a variety of text modalities, genres and conditions of reading and listening is essential. Teachers and learners need to be able to set goals, and as Cobb's study of learning opportunities (2007) has shown, coverage percentages and their associated vocabulary knowledge requirements have important implications for the acquisition of new word knowledge through exposure to comprehensible L2 input. This article proposes approximate replications of Nation (2006), van Zeeland & Schmitt (2012), and Cobb (2007), in order to clarify these key coverage and size figures.

This study analyzed phonological short-term memory (PSTM) and working memory (WM) and their relationship with vocabulary and grammar learning in an artificial foreign language. Nonword repetition, nonword recognition, and listening span were used as memory measures. Participants learned the singular forms of vocabulary for an artificial foreign language before being exposed to plural forms in sentence contexts. Participants were tested on their ability to induce the grammatical forms and to generalize the forms to novel utterances. Individual differences in final abilities in vocabulary and grammar correlated between 0.44 and 0.76, depending on the measure. Despite these strong associations, the results demonstrated significant independent effects of PSTM and WM on L2 vocabulary learning and on L2 grammar learning, some of which were mediated by vocabulary and some of which were direct effects.

The article overviews current research on second language vocabulary learning. It concludes that a large vocabulary is necessary to function in English: 8000-9000 word families for reading, and perhaps as many as 5000-7000 families for oral discourse. In addition, a number of word knowledge aspects need to be learned about each lexical item. Taken together, this amounts to a substantial lexical learning challenge, one which many/most learners fail to meet. To facilitate adequate vocabulary learning, four vocabulary learning partners (students, teachers, materials writers, and researchers) need to contribute to the learning process. Vocabulary learning programs need to include both an explicit, intentional learning component and a component based around maximizing exposure and incidental learning. The four learning strands (meaning-focused input, meaning-focused output, language-focused learning, and fluency development) suggested by Nation (2001) provide a structure by which to integrate intentional and incidental vocabulary learning. The overriding principle for maximizing vocabulary learning is to increase the amount of engagement learners have with lexical items. All four learning partners need to acknowledge the incremental nature of vocabulary learning, and to develop learning programs which are principled, long-term, and which recognize the richness and scope of the lexical knowledge that needs to be mastered. (Verlag, adapt.).

This article reviews research on working memory (WM) and its use in second language (L2) acquisition research. Recent developments in the model and issues surrounding the operationalization of the construct itself are presented, followed by a discussion of various methods of measuring WM. These methods include word and digit span tasks, reading, listening and speaking span tasks. We next outline the role proposed for WM in explaining individual differences in L2 learning processes and outcomes, including sentence processing, reading, speaking, lexical development and general proficiency. Key findings are that WM is not a unitary construct and that its role varies depending on the age of the L2 learners, the task and the linguistic domain. Some tests of WM may in fact be tests of differences in ability to attend to aspects of the L2. Future research will focus on matching tests of WM more closely with linguistic tasks and using more standardized, replicable measures of WM in new areas including writing in non-alphabetic scripts, instructional interventions and cognitive neuropsychology.

This study investigates relations between second language (L2) lexical input and output in terms of word information properties (i.e., lexical salience; Ellis, 2006a). The data for this study come from a longitudinal corpus of naturalistic spoken data between L2 learners and first language (L1) interlocutors collected over a year's time. The corpus was analyzed using word information properties related to concreteness, familiarity, and meaningfulness to examine word repetitions between input and output, correlations between the input and the output, linear trends over time, and whether lexical properties in the output were predictive of growth in TOEFL scores. The results indicate that L2 learners are more likely to repeat word types found in L1 input and that L1 interlocutors and L2 learners follow similar linear trends over time such that words with lower concreteness, lower familiarity, and lower meaningfulness were produced over the course of the study in both the input and output. A linear mixed model analysis showed that decreases in concreteness scores explained significant gains in TOEFL scores over time. The findings from the study indicate strong associations between L2 input and output and provide evidence linking development in word information properties to development in academic English proficiency.

The logographic nature of the Chinese writing system creates a huge hurdle for Chinese as a foreign language (CFL) learners. Existing literature suggests that radical knowledge facilitates character learning. In this project, the authors selected 48 compound characters in eight radical groups and examined how grouping characters based on their radicals affected the form, sound, and meaning representations of characters and radical knowledge development. They found that for beginning learners, learning radical-sharing characters in groups consistently led to better recall and better radical generalization than learning in distribution. For intermediate level learners, the grouping factor did not lead to significant differences, while participants in both conditions made improvement in radical perception and radical semantic awareness generalization. The authors concluded that there is a benefit to presenting learners with recurring radicals in compound characters in groups in character learning and in the autonomous generalization of radical knowledge. They also noted the differences between beginning and intermediate learners in their character perception and learning, and put forward implications for CFL pedagogy. (Verlag, adapt.).

In the interest of clarifying how gesture facilitates L2 word learning, the current study investigates gesture's influence on three interrelated cognitive processes subserving L2 word learning: communication, encoding, and recall. Individuals unfamiliar with Hungarian learned 20 Hungarian words that were either accompanied or unaccompanied by gestures depicting their referents, and taught the meanings of the words to interlocutors who were also unfamiliar with Hungarian. All participants were then tested for their recall of target words. The results show that gesture facilitates all three cognitive processes, supporting the predictions of McNeill's (2005) growth point theory. Furthermore, the results indicate that gesture production facilitates all of the cognitive processes more effectively than gesture viewing. Overall, the results demonstrate that gesture can serve as an effective cognitive aid for L2 word learning by beginning L2 learners, particularly in task-focused, conversational settings. (Verlag).

Within the framework of Conversation Analysis for Second Language Acquisition (CA-SLA), this study uses learning behavior tracking (LBT) (Markee, 2008) with longitudinal data to investigate word learning by one adult second language (L2) user of English. The adult is a first language (L1) user of Japanese with limited proficiency in English. Data are drawn from audio-recorded conversations-for-learning (Kasper, 2004) between this adult and the researcher, an L1 user of English and L2 user of Japanese, across a 7-month period. The analysis focuses on the learning of the word near and the nonuse of the synonym close. Repair work is found to create opportunities for learning. It is argued that a word is likely to be learned if it is found to be immediately useful. Methodologically, this study shows that CA-SLA used with longitudinal data can be used to investigate word learning, meeting the criteria developed by Ellis (2010) for showing learning. (Verlag).