One of the fundamental questions in the field of language acquisition is a learnability problem, which considers how learners acquire certain aspects of language which are not directly provided in the input or whose referents are not readily observable. This dissertation investigates Japanese children's acquisition of various linguistic phenomena,…

Study abroad homestays are generally assumed to provide visitors with opportunities to learn language 'in the wild' by participating in the host family's everyday life. Ultimately such participation is accomplished via individual episodes of interaction as the visitor is socialized into the family's mundane routines and rituals. Building on…

The importance of input on language learning cannot be overstated. One method of providing input to learners at a level that is appropriate for them is called extensive reading, in which learners read an abundance of texts. In practice, for learners of English as a second or foreign language, these texts are often books that have been written and…

Semantic variables enable L2 researchers and materials creators to quantify and control the effects of meaning on cognition. However, in recent years, many variables have been normed and published. Parsing the methods employed in norming this myriad of variables and which disparate theories informed their creation can be an opaque and arduous…

Research on advanced L2 adult learners and viable classroom instruction for them has become increasingly important along with increasing global connections. This study investigated the effects of different kinds of spoken input modification on listening comprehension and incidental vocabulary learning by 106 advanced Chinese speakers of Japanese…

Previous research has shown that an increased second language (L2) vocabulary size leads to better attunement to the cues required to distinguish L2 contrastive phones. This has been the central tenet of the vocabulary-tuning model (vocab) on the basis of evidence by Japanese learners of English in Australia. We aim to test the validity of the…

Because a large number of Chinese characters are commonly used in both Japanese and Chinese, Chinese-speaking learners of Japanese as a second language (JSL) find it more challenging to learn Japanese functional expressions than to learn other Japanese vocabulary. To address this challenge, we have developed "Jastudy," a…

Research into dual-modality theory has long rested on the assumption that presenting input in two modalities leads to better learning outcomes. However, this may not always hold true. This study explored the possible advantages of using dual modality in repeated reading--a pedagogy often used to enhance reading development--for two literacy…

The importance of input factors for bilingual children's vocabulary development was investigated. Forty-seven Argentine, 42 South Korean, 51 European American, 29 Latino immigrant, 26 Japanese immigrant, and 35 Korean immigrant mothers completed checklists of their 20-month-old children's productive vocabularies. Bilingual children's vocabulary…

The study reported in this article investigated the comparative effects of two types of treatment--one of which emphasized input and the other output--on the vocabulary acquisition of young EFL learners. In the input-based instruction, the students were not required to produce output whereas in the production-based instruction the students were…