Ensuring second language (L2) learners have an adequate breadth and depth of L2 vocabulary knowledge is a key pedagogical objective in L2 learning contexts. For this reason, establishing guiding principles that successfully enhance the efficacy of L2 vocabulary knowledge development is of strong importance. The current study investigated the value…

This study investigates the probable effect of a digital game-based vocabulary learning (DGBVL) task on the acquisition of some components of a word knowledge framework. In so doing, 124 Persian speakers (56 males and 68 females) were randomly assigned to either a control or an experimental group. The experimental group participants completed a…

This study set out to inspect Laufer and Hulstijn's (2001) motivational-cognitive construct of task-induced involvement. Involvement load hypothesis predicts that tasks with the same involvement loads lead to the same amount of learning. To this end, three output task types which induce equal involvement indices of 3 were employed to examine the…

This study was an attempt to investigate the effect of choice theory-based instruction on Iranian EFL learners' vocabulary achievement. To fulfil the purpose of this study, 60 female advanced EFL learners were selected from among a total number of 90 learners through their performance on a piloted sample Cambridge ESOL Certificate of Advanced…

This mixed two-way experimental, cross-sectional study investigated fast-mapping (FM) of novel nouns and verbs in 63 Persian-speaking toddlers aged 30 months, including 31 late-talking (LT) and 32 typically developing (TD) matched with respect to age and maternal education. Toddlers were classified as LT if they had limited expressive vocabulary…

The current study investigated the influence of oral reproduction and summary writing vocabulary tasks on English as a Foreign Language (EFL) learners' learning and retention of new foreign language (L2) words. To this end, 66 advanced EFL learners were randomly selected and assigned to two experimental and one control conditions. The participants…

This paper reports an investigation into whether a test of productive vocabulary size using a category generation task can be useful and effective. A category generation task is a simple task where learners are asked to name as many as words as they can from a prescribed category such as "animals" or "body" parts. The virtue of…

As task-based language teaching focuses on real word tasks and the learners need to complete these tasks in the process of learning a foreign or second language, it helps target language fluency and student confidence. That is why second and foreign language teachers and researchers have shown interest in TBLT. This study attempts to investigate…

This study examined the effects of task types on English as a foreign language (EFL) learners' receptive and productive vocabulary knowledge. To this end, 130 (70 female and 60 male) EFL learners were randomly assigned to one of six tasks of learning 30 target words. The design of the tasks was based on the involvement load hypothesis (ILH)…

Vocabulary development is an essential goal in any language teaching program, and considering the multidimensional nature of this construct, achieving this goal needs effective assessment of all dimensions of word knowledge, i.e. breadth, depth and accessibility of word knowledge. Most of the current vocabulary assessment tools measure the breadth…

The current research was an attempt to explore the washback impact of task-based instruction (TBI) on EFL Iranian learners' vocabulary development. To this end, conducting an Oxford Placement Test (OPT), 30 out of 72 EFL Iranian learners studying in an English language institute, were randomly selected. Then, they were assigned to experimental (N…

This study examined the effect of the interaction approach on young EFL learners' lexical depth in a private language institute in Talesh, Iran. To achieve this, a Michigan test was administered to 40 EFL learners. Those language learners who met the selection criterion, i.e., performed one standard deviation above and below the mean on the test…

The present study investigated linguistic focus of language related episodes (LREs),in Iranian EFL classrooms. Eighteen male participants in the advanced and intermediate levels from Urmia branch of Academic Centre of Education, Culture and Research (ACECR) participated in the study. They were assigned to intermediate and advanced levels with one…

This paper reports the findings of a study that investigated the effect of giving and receiving marginal L1 glosses on L2 vocabulary learning. To that end, forty nine Iranian learners of English were assigned to three different experimental conditions including marginal L1 glosses Giver (n = 17), marginal L1 glosses Receiver (n = 17), and no…

This study determines whether breadth and depth of vocabulary knowledge are related to L2 ease and success in lexical inferencing. To this end, two tests measuring vocabulary breadth and depth were administered to 50 participants. Two weeks later, all participants received an inferencing task and rated the degree of perceived ease in inferencing…