Search Results (34)

Researchers have found that learners’ second language development is influenced by internal and external individual differences but only few studies have adopted a longitudinal approach. In the present study, I aimed to investigate how several internal and external individual differences were interrelated and whether and how these variables predicted L2 English speaking development in adolescent learners. I conducted a dense longitudinal study with frequent measurements of L2 speaking skills. Learners in the first year of secondary school (11 to 13 years old, n = 48) did a weekly speaking task from September to May. At the start of the study, the participants also did multiple tasks, which measured various individual differences. Pearson correlations were calculated to shed light on the relationships between individual-difference variables, and generalized additive mixed models were used to model learning trajectories over time and to investigate the role of individual differences in this development. Results showed that learners’ speaking scores were predicted by time and prior L2 English receptive vocabulary knowledge, which was the main predictor of L2 speaking skills. Vocabulary knowledge furthermore significantly correlated with measures of out-of-school exposure and motivation. The results showed the key role of vocabulary in the early stages of L2 English learning. Full article

Background. Bilingual novel word learning is shaped by both semantic context and the language in which learning occurs. According to the context variability hypothesis and instance-based learning frameworks, varied semantic contexts promote the formation of flexible lexical-semantic representations. However, the extent to which these benefits generalize across languages and transfer to novel contexts remains unclear. Method. Two experiments examined the effects of study language (L1, L2, or both) and semantic variability (repeated vs. varied contexts) on novel word learning in English–Spanish bilinguals. Participants studied rare words embedded in sentences and were tested via a word-stem completion task. In Experiment 1, test sentences were identical to those seen during the study. In Experiment 2, half of the test sentences were novel, requiring generalization beyond previously encountered contexts. Orthographic overlap across languages was also assessed. Results. In Experiment 1, varied semantic contexts improved recall accuracy, supporting the context variability hypothesis. Unexpectedly, words studied in L2 were recalled more accurately than those studied in L1, consistent with desirable difficulty effects. Additionally, orthographic overlap moderated learning, with greater benefits observed in mixed-language conditions. In Experiment 2, overall accuracy declined, and no main effects of language or context were observed. However, a three-way interaction showed that orthographic overlap improved recall only when words were studied in L1 and tested in novel contexts. Conclusions. Semantic and linguistic variability can enhance bilingual word learning when test conditions are consistent with the learning context. However, generalization to novel contexts may require deeper processing, extended exposure, or additional retrieval cues. Full article

Objective: This review aims to assess the efficacy and safety of different supplements, such as L-theanine, caffeine, Ginkgo biloba L., and Bacopa monnieri for improving ADHD symptoms, to determine the most effective supplement and provide insight for medical practice. Methods: International databases (PubMed/MEDLINE and Scopus) were searched for English-language RCTs, open-label studies, and cross-sectional studies. Results: Studies on L-theanine, caffeine, Ginkgo biloba L., and Bacopa monnieri have shown various effects on ADHD symptoms. L-theanine improved sleep efficiency but not other sleep parameters. Caffeine showed no significant benefits, although its combination with L-theanine may enhance attention. Bacopa monnieri consistently improved inattention, hyperactivity, and memory, whereas Ginkgo biloba L. reduced ADHD symptoms, particularly inattention, but was less effective than methylphenidate. Conclusions: The evidence revealed the potential use of supplements as complementary ADHD treatments under clinical guidance. The limited effect of supplements cannot replace the well-documented efficacy of stimulants for ADHD treatment. Additional studies are needed to ascertain the most effective dosages and the safety of these supplements as adjunctive treatments for ADHD. Full article

This study investigates the cross-linguistic priming effect in the syntactic written output of late bilingual Levantine Arabic speakers who learn English as a second language. In particular, we examined priming sentence type (simple vs. complex sentences) and priming language condition (Levantine Arabic vs. English). Forty-nine bilinguals (Mean age = 33.3, SD = 8.5), who learned Levantine Arabic as their L1 and English as their L2, were primed with a short paragraph presented on the computer screen in either English or Levantine Arabic and asked to produce a written response in the counterpart language. Logistic regression analysis revealed a significant cross-linguistic priming effect, suggesting that the syntactic structure of the prime in the participants’ first language (Levantine Arabic) predicts the participants’ written output in the second language (English), and the reverse is also true. However, there was no significant effect of priming sentence type (simple vs. complex) on the likelihood of producing primed res ponses, indicating that both priming conditions yielded similar levels of priming. In contrast, there was a significant effect of the priming language condition, with participants significantly more likely to produce syntactically primed responses when the priming language was Arabic compared to English. In addition, there was a significant interaction between the priming language condition and priming sentence type: Arabic priming led to more simple sentence production in English, whereas English priming did not significantly affect sentence complexity in Arabic. These findings align with the shared syntax account but highlight the need to consider factors such as language dominance in bilingual syntactic processing. Full article

Existing studies have revealed that the reading comprehension ability of readers can be adversely affected by their psychosocial stress. Yet, the detailed impact of stress on various stages of text processing is understudied. This study aims to explore how the higher-level text processing ability, including syntactic parsing, sentence integration, and global text processing, of first language (L1) and second language (L2) English readers is affected under stress situations. In addition, the roles of trait anxiety, the central executive function moderating stress effects, in text processing were also examined. Twenty-two L1 readers and twenty-one L2 readers were asked to perform reading comprehension tasks under different stress situations. Eye-tracking technology was adopted to record participants’ visual behaviors while reading, and ten eye-movement measurements were computed to represent the effect of different types of text processing. The results demonstrate that the stress reduced the efficiency of syntactic parsing and sentence integration in both L1 and L2 groups, but only impaired global text processing in L2 readers. Specifically, L2 readers focused more on the topic structure of text to facilitate comprehension under stress situations. Moreover, only L1 readers’ higher-level text processing was affected by trait anxiety, while L2 readers’ processing was mainly related to their reading proficiency level. Future studies and applications were discussed. The findings advance our understanding of stress effects on different stages of higher-level text processing. They also have practical implications for developing interventions to help language learners suffering from stress disorders. Full article

This article presents a study examining the vocabulary knowledge of English as an additional language (EAL) learners in two international schools in Japan in relation to the vocabulary profiles of the textbooks they are required to use in the classrooms. The vocabulary knowledge of 139 participants from two international schools was assessed using either the New Vocabulary Levels Test (NVLT) or the Updated Vocabulary Levels Test (UVLT). These results were compared to a 15 million-word corpus compiled from representative subject-specific textbooks to estimate the vocabulary coverage participants are likely to achieve. The findings revealed that EAL learners consistently scored lower than a combined group of their first-language English (FLE) and proficient L2 (PL2) peers, with fewer than 25% of EAL learners mastering the AWL before Grade 12. Furthermore, even the most frequent 5000-word bands provided only 91–93% coverage for subjects like biology and chemistry, leaving many EAL learners struggling to comprehend these texts. This analysis highlights the potential difficulties EAL learners may face in understanding the textbooks that are being used in EAL classrooms, underscoring the need for better vocabulary scaffolding and support for such learners in the international school context. Full article

Background: The MDAS questionnaire is one of a number of scales available to assess dental anxiety. It is widely used and translated into many world languages; however, it lacks an explicit theoretical backdrop to the content and structure of the measure. This paper draws upon original expositions of dental anxiety: how it develops, is maintained, and how this draws attention to a re-evaluation of the measure. To assist this inspection it was proposed to investigate a two latent construct formulation through a stepwise analysis using data from a representative survey of English respondents on their oral health (the Adult Dental Health Survey). Aim: To present a brief theoretical framework to underpin the measure and, as part of this study’s objectives, to provide some evidence to support the measure’s potential two-construct structure. Method: Narrative review, structural equation modelling, and testing of specific associations to indicate a two latent construct formulation. Data included the MDAS items (where items 1 and 2 comprise the anticipatory subscale, and items 3 to 5 describe the treatment-related subscale). These items were completed by the representative sample of respondents from the most recent Adult Dental Health Survey conducted in 2009. Results: The two latent construct solution for describing dental anxiety was supported. The anticipated and treatment-related subscales could be discriminated, although they were strongly correlated, demonstrating overlap. Comparison of how each construct varied across the three age groups suggests an interesting heterogeneity. In addition, the two constructs behaved differently when acknowledging previous experience of respondents’ last dental visit. Anticipatory dental anxiety was more strongly related to oral health-related quality of life (OHRQoL) than treatment-related dental anxiety as predicted. This partial evidence from empirical data and previous reports in other studies suggests that the separation of the MDAS measure into the two subscales may be warranted. Discussion: Researchers are recommended to report not only the total score of the MDAS in their studies but also consider presenting the two subscale scores, namely, anticipatory and treatment-related dental anxiety. Further work is indicated to determine if clinicians may find the subscales of use when assessing their patients. Full article

A number of different language measures are used in child language acquisition studies. This raises the issue of comparability across tasks, and whether this comparability diverges depending on the specific language domain or the language population (e.g., monolinguals versus bilinguals). The current study investigates the comparability across tasks in the domains of vocabulary, morphology, and syntax in primary-school-aged sequential bilingual children with L1 Arabic/L2 English (N = 40, 5;7–12;2) and age-matched monolinguals (N = 40). We collected narrated speech samples to produce measures across language domains, and additional measures from separate vocabulary, morphology, and syntax assessments. Using a logistic regression analysis, we find a correspondence between syntax measures in monolinguals; however, we find no further correspondences in the other domains for monolinguals, and no correspondences at all in bilinguals. This suggests that assessment measures are highly task-dependent, and that a given assessment measure is not necessarily indicative of language as a whole, or even of language within a domain. We also find selective effects of age for monolinguals and both age and length of exposure (LOE) for bilinguals; in particular, while LOE predicts variation between the first and second language, age effects reflect underlying similarity across languages. We consider the implications of these effects for language assessments across populations. Full article

Research has established cognate facilitation effects as a robust finding in bilingual adults and children. Recent studies suggest that cognate facilitation also occurs in highly proficient trilingual adults and can even accumulate across languages. The evidence for multilingual children is scarce and inconclusive. This study examines whether and in which direction cognate effects arise in 35 ten-year-old unbalanced trilingual children, who, in addition to their L1 Italian, acquired L2 German and L3 English in a three-way immersion class in the multilingual region of South Tyrol in Italy. We manipulated cognate status, comparing naming accuracy and latencies in both the L1 and the L3 across double, triple, and non-cognates. The results reveal cognate facilitation effects in naming accuracy, but not in naming speed, for all cognate conditions relative to non-cognates. Furthermore, cognate facilitation was restricted to the L3, replicating previously attested asymmetric effects in unbalanced speakers. In sum, the results indicate that cognate facilitation may boost lexical learning in unbalanced trilingual children who acquire the L2 and the L3 in mainly instructed settings. We discuss these findings in relation to the potential role of language proximity, the L2 status factor, and implications for lexical learning in diverse multilingual environments. Full article

Additive manufacturing resins used in dental prosthetics may retain uncured monomers post-polymerization, posing potential long-term patient exposure risks. Understanding the biological safety of these materials is crucial, particularly for 3D-printed acrylic-based prosthodontic devices such as occlusal nightguards, complete and partial dentures, and temporary fixed prostheses. This paper reviews the literature evaluating the cytotoxicity of such materials. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines, we conducted a scoping review using the MESH keywords related to population (P), intervention (I), comparison (C), and outcome (O) across databases, including OVID Medline, EMBASE, and SCOPUS. Our search, limited to peer-reviewed English language articles from 2015 to 2023, resulted in 22 papers. These studies, utilizing digital light processing (DLP) or stereolithography (SLA) printing methods, varied in examining different 3D-printed materials, as well as washing and post-curing protocols. The primary experimental cells used were human gingival fibroblasts (HGF) and mouse fibroblasts (L929). There are no statistical differences in biocompatibility regarding different commercially available resins, washing solutions, or methods. Improvements in cell viability were related to an increase in washing time, as well as post-curing time. After the polishing procedure, 3D resin-based printed occlusal devices perform similarly to milled and conventionally processed ones. Our findings underline the importance of appropriate washing and post-curing protocols in minimizing the cytotoxic risks associated with these 3D-printed resin-based devices. Full article

Drawing on second language acquisition theories and existing visuals, this article proposes a new educational metaphor, Lane’s L2+ Acquisition Rope, to encompass the complexities of second or additional language learning. This metaphor integrates five major strands—external factors, social factors, affective factors, innate factors, and internal factors—to provide a comprehensive framework for understanding proficient second language acquisition. Implications of this visual highlight the importance of incorporating socio-cultural, neurological, and affective dimensions into educational metaphors to support diverse learners effectively. Lane’s L2+ Acquisition Rope offers a promising avenue for educators to enhance instructional practices and promote equitable learning outcomes for English Language Learners and other student subgroups. Full article

Learners of additional languages, particularly in adulthood and instructed settings, are typically exposed to large quantities of written input from the earliest stages of learning, with varied and far-reaching effects on L2 phonology. Most research investigating this topic focuses on learning across languages that share the same orthographic script, often involving the Latin alphabet and English. Without exploring phonological learning over a greater diversity of spoken and written language combinations, our understanding of orthographic effects on L2 phonology remains narrow and unrepresentative of the many individuals acquiring languages across writing systems, globally. This paper draws together preliminary research relating to the influence of written input, in a distinct script from known languages, on L2 phonology. Studies are grouped into those with naïve participants, where the written forms are entirely unfamiliar to the participant, and those with experienced learners, who have varying levels of proficiency and familiarity with the target orthography. While there is great scope and need for further investigation, initial evidence suggests that even entirely unfamiliar written input impacts phonological learning and is certainly influential with growing proficiency in the spoken and written language. The article concludes with theoretical and methodological considerations for future research in this emerging field. Full article

The study investigates psycholinguistic mechanisms of sentence parsing and ambiguity resolution by balanced Tatar–Russian bilinguals who learnt English as their additional language. We check the parser’s sensitivity to the selectional properties of the matrix verb and/or social conventions in processing and attachment resolution of ambiguous relative clauses (RCs). We chose English and Russian because they have a documented preference for low attachment (LA) and high attachment (HA), respectively, and Tatar, as we have found out in earlier work, has no attachment ambiguity. We conducted a self-paced reading task in English and Russian which returned 61% HA in Russian, 49% HA in English. It was followed by a pen-and-paper translation task. The translation post-test checked whether an attachment preference demonstrated in either English or Russian showed in RC translations into Tatar. The results return an 80% preference for LA in English–Tatar translations and 61% in Russian–Tatar translations. Both syntactic information and world knowledge influence online RC processing in Russian and English. Therefore, the multilingual parser incorporates information from multiple sources in either L1 or Ln processing. The parser may favor LA as a default parsing option while maintaining sensitivity to individual grammars (Russian), where this preference should be overridden. Full article

Aims: The present study aimed to investigate whether and how the subcomponents of language control during spoken and written productions were modulated by cognitive control. Method: In the current study, unbalanced Chinese–English bilinguals were recruited from a convenience sample at a university to complete the cued language naming task in spoken production and written production, which measured the local language control (as indexed by language switch costs) and the global language control (as indexed by language mixing costs and reversed language dominance effect). In addition, all the participants performed the Simon task, which measured their general inhibitory control ability by calculating the Simon effect, and performed the AX-CPT task to measure their reactive/proactive control preference by calculating their BSI score. All the data were collected using E-prime 2.0 and analyzed in R. Linear mixed-effect model analyses were conducted to reveal the similarities and differences between spoken production and written production for the first-step analysis. Then, the Simon effect and BSI scores were inserted into the mixed-effect models of the switch costs and mixing costs in spoken production and written production, respectively, to explore whether cognitive control can predict the subcomponents of bilingual control. Results: The results showed similar symmetrical switch costs in spoken and written modalities. In contrast, there was a reversed language dominance effect (in the mixed language context) and asymmetrical mixing costs in spoken production but neither in written production. Furthermore, we found that the Simon effect significantly negatively predicted the L2 mixing costs in spoken production, whereas the BSI score significantly negatively predicted both the L1 and L2 mixing costs in written production. Conclusion: The findings indicated that, for unbalanced bilinguals, local language control is shared between two modalities, while global language control is modality-independent between spoken production and written production. More importantly, the findings also suggested that global language control in spoken production relies more on the individuals’ general inhibitory control, while in written production, it relies more on their cognitive control strategy. Global language control in spoken and written productions separately engages specific aspects of cognitive control, which may account for different forms of processing in global language control between speaking and writing. Full article

The evidence obtained to date supports the use of captioned videos for L2 learning purposes, such as vocabulary acquisition and the development of L2 listening skills. However, little research has been conducted with primary school learners, and even less so on the extent to which L2-captioned videos foster the development of L2 reading skills. Thus, the present investigation aimed to determine the extent to which five groups of primary school EFL learners from Chile (n = 96, 9–11 years old, years 4 and 5) benefited from their viewing experience (11 captioned videos) as regards the development of L2 listening skills and L2 reading efficacy (measured at pretest, posttest, and delayed-posttest). In addition, we assessed the influence of L1- and L2-related factors on learners’ performance over time (L1 and L2 reading efficacy, L2 vocabulary knowledge, and L2 listening skills). Overall, the results revealed that the treatment led to significant gains in English listening skills and reading efficacy in fourth and fifth graders. However, learners’ performance was also found to be predicted by language-related factors, especially L2 vocabulary knowledge. On the whole, the findings of this investigation support the use of age-appropriate captioned videos at primary school to increase children’s exposure to the target language and enhance the development of receptive language skills. Full article