We present one of the first behavior-genetic studies of individual differences in school students' levels of achievement in instructed second language acquisition (ISLA). We assessed these language abilities in Australian twin pairs (maximum N pairs = 251) by means of teacher ratings, class rankings, and self-ratings of proficiency, and used the…

Within the input and interaction research paradigm, how learners' individual differences play a role in using learning opportunities during interaction has become one of the main areas of investigation. Recasts have also received much attention in interaction research. This paper explores the extent to which individual differences in grammatical…

This inquiry analyzed the relationships between individual differences and gains made in oral proficiency of adult, second language learners of Spanish during one semester studying abroad. Oral proficiency was measured using a pre/post-SA Computerized Oral Proficiency Instrument (COPI, CAL, 2009). Gain scores were correlated with two cognitive…

The present study investigates the interaction between two types of explicit instructional approaches, deduction and explicit-induction, and the level of foreign language aptitude in the learning of grammar rules. Results indicate that on the whole the two equally explicit instructional approaches did not differentially affect learning…

In this article, we report the results of a study on the relationship between individual differences in language learning aptitude and the structural connectivity of language pathways in the adult brain, the first of its kind. We measured four components of language aptitude ("vocabulary learning"; "sound recognition"; "sound-symbol…

Peer victimization, or bullying, has been identified as a significant child health priority and children with language impairment (LI) are among those who are vulnerable. Given the mandate of educators to provide support for "all" students who are bullied regardless of language status, research is needed that integrates the study of risk factors…

Background: In the literature so far the limited research on specific language impairment (SLI) in bilingual children has concentrated on linguistic skills in the first language (L1) and/or the second language (L2) without paying attention to the relations between the two types of skills and to the issue of linguistic transfer. Aims: To examine…

Developmental predictors of children's fraction concepts and procedures at the end of fourth grade were investigated in a 2-year longitudinal study. Participants were 357 children who started the study in third grade. Attentive behavior, language, nonverbal reasoning, number line estimation, calculation fluency, and reading fluency each…

This research aims to develop instruments to assess language development in under-3s and the adult interventions that support it. After an extensive literature search, observations were conducted in 17 groups of children spread over two day-care centres. In total 42 children were observed during a 30-minute slot and 25 adults during a half day.…

In this article, I describe studies conducted over 25 years with secondary and post-secondary L2 learners in the United States. The evidence from these studies shows that there are important connections between students' early L1 skills and their L2 aptitude and L2 proficiency and that individual differences in students' L1 skills in elementary…

Educators of young children, including speech-language pathologists, are often uncertain as to how to effectively work with children from diverse backgrounds because they do not know enough about cultural and linguistic diversity and its impact on language development. The current study helps to address this gap by examining the validity of parent…

Relationships between foreign language learning and four characteristics--anxiety, aptitude, attitudes and attributions for success--were investigated for 95 students enrolled in introductory level Spanish classes at a large, southeastern university in the United States. Examination grades resulted in significantly positive correlation with an…

The research investigated the hypothesis that teachers' ratings of kindergarten children's receptive and expressive language ability would be related to children's social competence. Teachers' ratings of social competence were obtained for a sample of 116 kindergarten children. Social competence was measured using the California Preschool Social…

The goal of this study is to investigate the role of working memory capacity in L2 attainment and performance. The study uses an L1 reading span task to measure working memory of a group of 59 high-intermediate/advanced learners of English, and a film retelling task to measure their oral production. The analysis first showed a moderate to high…

This paper presents evidence that supports the valid use of scores from fully automatic tests of spoken language ability to indicate a person's effectiveness in spoken communication. The paper reviews the constructs, scoring, and the concurrent validity evidence of "facility-in-L2" tests, a family of automated spoken language tests in Spanish,…