There is a great deal of variation in gains found between studies of second language (L2) incidental vocabulary learning, as well as many factors that affect learning. This meta-analysis investigated the effects of exposure to L2 meaning-focused input on incidental vocabulary learning with an aim to clarify the proportional gains that occur…

The present meta-analysis aimed to improve on Involvement Load Hypothesis (ILH) by incorporating it into a broader framework that predicts incidental vocabulary learning. Studies testing the ILH were systematically collected and 42 studies meeting our inclusion criteria were analyzed. The model-selection approach was used to determine the optimal…

This study investigated the potential of discipline-related television programs as sources for incidental learning of specialized vocabulary used in university lectures and seminars. First, a Medical Spoken Word List (MSWL) of 895 specialized word types was developed from a 556,074-word corpus of medical lectures and seminars based on a mixed…

Television programs are a rich source of input for which we can utilize in vocabulary acquisition. With foreign language television programs becoming more accessible globally, there is the possibility to better use this input source for learning. Can we incorporate television viewing into classroom learning (intentional learning)? Or use it as a…

This article reviews the empirical research on incidental vocabulary acquisition in English reading in the latest twenty years from three aspects: its comparison with intentional vocabulary acquisition, its affecting factors and previous studies of its problems. Teaching implications have also been provided.

Vocabulary acquisition, after being neglected for centuries, aroused people's attention from the second half of last century. At that time, people began to realize, instead of grammar, vocabulary occupies the central role in language acquisition (Gass & Selinker, 1994). Compared with intentional vocabulary acquisition, incidental vocabulary…

The involvement load hypothesis (ILH) was designed to predict the effectiveness of instructional tasks for incidental L2 vocabulary learning. In this meta-analysis we examined 398 effect sizes from 42 empirical studies (N = 4,628) to explore (a) the overall predictive ability of the ILH, (b) the relative effects of different components of the ILH…

This meta-analysis aimed to clarify the complex relationship between repetition and second language (L2) incidental vocabulary learning by meta-analyzing primary studies reporting correlation coefficients between the number of encounters and vocabulary learning. We synthesized and quantitatively analyzed 45 effect sizes from 26 studies (N = 1,918)…

Vocabulary teaching and learning has always been a difficult task for both language teachers and learners since every language learner needs to learn a large number of words for successful communication in the target language. To alleviate the vocabulary learning process, teachers and researchers are looking for new vocabulary learning strategies…

Extensive reading for second language learners have been widely documented over the past few decades. However, few studies, if any, have used a corpus analysis approach to analyze the vocabulary coverage within a single-author story series, its repetition of vocabulary, and the incidental and intentional vocabulary learning opportunities therein.…

This literature review aims to analyze previous studies that address the incidental learning of vocabulary in second language acquisition. The articles included in this literature review look into the understanding of vocabulary learning through incidental means, the relationship of reading and incidental vocabulary learning, and the strategies…

The present review explores the meaning of the term 'incidental' in light of how incidental learning is framed, conceptualized, and operationalized in second language (L2) vocabulary research. Three interpretations of incidental vocabulary learning that seem to appear recurrently in the literature are presented and discussed along with examples of…

This article reviews some essential theoretical and empirical research literature that discusses the role of memory in second language acquisition and instruction. Two models of literature review--thematic and study-by-study--were used to analyze and synthesize the existing research. First, issues of memory retention in second language acquisition…