Non-adjacent dependency learning from variable input : investigating the effects of bilingualism, phonological memory, and cognitive control

INTRODUCTION: One proposed advantage of bilingualism concerns the ability to extract regularities based on frequency information (statistical learning). Specifically, it has been proposed that bilinguals have an advantage in statistical learning that particularly holds in situations of variable input. Empirical evidence on this matter is scarce. An additional question is whether a potential bilingual advantage in statistical learning can be attributed to enhancements in phonological memory and cognitive control. Previous findings on effects of bilingualism on phonological memory and cognitive control are not consistent. METHOD: In the present study, we compared statistical learning from consistent and variable input in monolingual and bilingual children (Study 1) and adults (Study 2). We also explored whether phonological memory and cognitive control might account for any potential group differences found. RESULTS: The findings suggest that there might be some advantage of bilinguals in statistical learning, but that this advantage is not robust: It largely surfaced only in t-tests against chance for the groups separately, did not surface in the same way for children and adults, and was modulated by experiment order. Furthermore, our results provide no evidence that any enhancement in bilinguals' statistical learning was related to improved phonological memory and cognitive control: bilinguals did not outperform monolinguals on these cognitive measures and performance on these measures did not consistently relate to statistical learning outcomes. DISCUSSION: Taken together, these findings suggest that any potential effects of bilingualism on statistical learning probably do not involve enhanced cognitive abilities associated with bilingualism

Working memory and L2 grammar development in children

The role of working memory in language learning has received considerable attention, but several pertinent issues remain. One of these concerns the directionality of the relationships between working memory and language learning. Another issue relates to different types of processing and working memory components involved in learning different aspects of a second language (vocabulary, grammatical sub-skills, e.g., subject-verb agreement, verb placement, word order, auxiliaries). In this chapter we review and integrate findings of previous studies, following the extraction and integration model (Thiessen et al., 2013), and apply these to second language learning. In so doing, we distinguish between statistical learning based on conditional relations of adjacencies (extraction) and statistical learning based on distributional patterns of non-adjacencies (integration). We propose how L2 children's gradual increase in knowledge of the second language increases the sensitivity of working memory to cues in ambient speech that, in turn, fosters further second language learning

Particules additives et finitude en néerlandais et allemand L2

Cette étude traite de la question de savoir s’il y a une relation entre les équivalents des particules additives ‘aussi’ et ‘de nouveau’ portant sur le topique et la finitude dans la variété des apprenants turcophones du néerlandais et de l’allemand. Dans les données obtenues avec une tâche contrôlée, nous observons que la finitude est moins fréquemment marquée dans les énoncés contenant ces particules que les énoncés comparables qui ne contiennent pas ces particules. Ceci est vrai pour le marquage de la finitude sur les verbes lexicaux ainsi que pour la présence de verbes conjugués sans contenu lexical comme la copule. De plus, nous montrons que les particules peuvent précéder le verbe conjugué dans la langue des apprenants. Ces résultats peuvent être expliqués par la similarité fonctionnelle entre la finitude et les particules portant sur le topique.This study investigates whether there is a relation between topic-related additive particles (equivalents of English ‘also’ and ‘again’) and finiteness in the learner variety of Turkish learners of Dutch and German. In data from a controlled elicited production task, we observe that utterances which contain such a particle are less often non-finite than utterances without such a particle. This holds for finiteness marking on lexical verbs as well as for the presence of light verbs such as the copula. Moreover, we show that particles can precede the finite verb in learner language. We propose the similar function of finiteness and topic-related particles as an explanation for these results

Particules additives et finitude en néerlandais et allemand L2

Cette étude traite de la question de savoir s’il y a une relation entre les équivalents des particules additives ‘aussi’ et ‘de nouveau’ portant sur le topique et la finitude dans la variété des apprenants turcophones du néerlandais et de l’allemand. Dans les données obtenues avec une tâche contrôlée, nous observons que la finitude est moins fréquemment marquée dans les énoncés contenant ces particules que les énoncés comparables qui ne contiennent pas ces particules. Ceci est vrai pour le marquage de la finitude sur les verbes lexicaux ainsi que pour la présence de verbes conjugués sans contenu lexical comme la copule. De plus, nous montrons que les particules peuvent précéder le verbe conjugué dans la langue des apprenants. Ces résultats peuvent être expliqués par la similarité fonctionnelle entre la finitude et les particules portant sur le topique.This study investigates whether there is a relation between topic-related additive particles (equivalents of English ‘also’ and ‘again’) and finiteness in the learner variety of Turkish learners of Dutch and German. In data from a controlled elicited production task, we observe that utterances which contain such a particle are less often non-finite than utterances without such a particle. This holds for finiteness marking on lexical verbs as well as for the presence of light verbs such as the copula. Moreover, we show that particles can precede the finite verb in learner language. We propose the similar function of finiteness and topic-related particles as an explanation for these results

‘Eating’, ‘drinken’ or both?

Network analytical approaches have been applied to the study of young bilinguals’ word learning strategies by a growing body of research in various settings (for a review, see Wojcik, 2018). They have investigated the effect of one language on the structure of the other’s network or compared both networks, trying to identify similarities. These studies have identified features that influence bilinguals’ acquisition process: frequency, phonological features (Bilson et al., 2015), the presence of translation equivalents and cognates (Bosch & Ramon-Casas, 2014), and familiarity (Wojcik, 2018), among others. The present study was an exploratory attempt to capture the structure of the receptive vocabulary networks of young bilingual children, by combining both of their languages. Network analysis can model the connections or links of word-nodes based on selected lexical features. The links in the present social networks were determined by how many of the participating children knew two words at the same time. This knowledge was previously tested with the English (Dunn & Dunn, 1997) and Dutch (Schlichting, 2005) versions of the Peabody Picture Vocabulary Test (PPVT) with children with early exposure to both languages (Aalberse et al. [MIND-team], 2021). Exposure to Dutch and English at children's homes and daycare centers for each individual child was assessed through a parental and daycare questionnaire respectively (MIND-team, 2021). Social network analysis, using the ORA-lite software (Altman & Reminga, 2018), was used to create a network for all the children (N=297; MAge= 34.5 months, SDAge= 6.5 months) and two networks of two subgroups based on exposure (Group A: higher English than Dutch exposure, and Group B: higher Dutch than English exposure). Average exposure scores were used as a threshold and cut-off point to determine ‘high’ and ‘low’ exposure groups. The Leiden algorithm was applied to the networks (Traag et al., 2019). The algorithm is designed to identify groups, sets, and clusters within dense networks with many nodes and links. The comparison of these three networks revealed the role of exposure in acquisition and hints at the strategies employed by bilingual children in word learning. The total group of children, without exposure factored in, showed clear clustering along the language divide, with Dutch words being more central in the network. To account for exposure, the total group was divided into two subgroups, one with higher exposure to Dutch (N=118; MAge= 34.84 months) and one with higher exposure to English (N=100, MAge= 34.23 months). Whereas the subgroup with higher Dutch exposure mirrored the clustering trends of the total group of children, the subgroup with higher English exposure showed higher cross-language clustering, with both English and Dutch words being in the same Leiden cluster more consistently in the network. In the group with higher Dutch exposure, the three node-sets detected, through the Leiden algorithm, were 1) central Dutch words, 2) peripheral Dutch words and 3) peripheral English words. Contrastively, for the group with higher English exposure, the central node-set included words from both languages. This marks a group of words (from both languages) with increased learnability and potential links with each other. Joint membership in frequent semantic categories (animal names, food, clothing, small household items, and body parts) and phonological features (word length and initial sound) are the most likely candidates that guided cross-language clustering. Word difficulty affected the structure of the network as a whole: words belonging to higher PPVT sets were known by fewer children than the ones in lower sets. Overall, exposure scores were shown to have an important effect on cross-language clustering and network structure. To which relative the children spoke to and for how long they spoke to them per day (MIND-team, 2021) could determine the centrality of words in the network. Children growing up in the Netherlands have a high exposure to Dutch, as the societal language. That meant that the English group (higher English exposure) had more exposure to Dutch than the Dutch group (higher Dutch exposure) had to English. For the English group, that led to a more balanced exposure to both languages, which most likely led to higher cross-language clustering for learned words. This study offers a new methodology for studying lexical acquisition, with the aim of capturing the interconnected nature of bilinguals’ languages. The results from the balanced exposure group are in accordance with emergentist accounts of language acquisition (Claussenius-Kalman et al., 2021), suggesting that ‘one word [might utilize] the conceptual packaging invoked by a word in the other language' (Bilson et al., 2015). There were semantic and phonological features that linked words across languages in learning. No strong effect of cross-linguistic learning was found for translation equivalents and cognates, because these items were rare between the English and Dutch versions of the PPVT. Nonetheless, the contributions of the present study are an added step to the investigation of the factors that might drive connectivity in lexical acquisition

Determinants of early lexical acquisition: Effects of word- and child-level factors on Dutch children’s acquisition of words

Previous research on the effects of word-level factors on lexical acquisition has shown that frequency and concreteness are most important. Here, we investigate CDI data from 1,030 Dutch children, collected with the short form of the Dutch CDI, to address (i) how word-level factors predict lexical acquisition, once child-level factors are controlled, (ii) whether effects of these word-level factors vary with word class and age, and (iii) whether any interactions with age are due to differences in receptive vocabulary. Mixed-effects regressions yielded effects of frequency and concreteness, but not of word class and phonological factors (e.g., word length, neighborhood density). The effect of frequency was stronger for nouns than predicates. The effects of frequency and concreteness decreased with age, and were not explained by differences in vocabulary knowledge. These findings extend earlier results to Dutch, and indicate that effects of age are not due to increases in vocabulary knowledge

Language Entropy Relates to Behavioral and Pupil Indices of Executive Control in Young Adult Bilinguals

Introduction: It has been proposed that bilinguals’ language use patterns are differentially associated with executive control. To further examine this, the present study relates the social diversity of bilingual language use to performance on a color-shape switching task (CSST) in a group of bilingual university students with diverse linguistic backgrounds. Crucially, this study used language entropy as a measure of bilinguals’ language use patterns. This continuous measure reflects a spectrum of language use in a variety of social contexts, ranging from compartmentalized use to fully integrated use. Methods: Language entropy for university and non-university contexts was calculated from questionnaire data on language use. Reaction times (RTs) were measured to calculate global RT and switching and mixing costs on the CSST, representing conflict monitoring, mental set shifting, and goal maintenance, respectively. In addition, this study innovatively recorded a potentially more sensitive measure of set shifting abilities, namely, pupil size during task performance. Results: Higher university entropy was related to slower global RT. Neither university entropy nor non-university entropy were associated with switching costs as manifested in RTs. However, bilinguals with more compartmentalized language use in non-university contexts showed a larger difference in pupil dilation for switch trials in comparison with non-switch trials. Mixing costs in RTs were reduced for bilinguals with higher diversity of language use in non-university contexts. No such effects were found for university entropy. Discussion: These results point to the social diversity of bilinguals’ language use as being associated with executive control, but the direction of the effects may depend on social context (university vs. non-university). Importantly, the results also suggest that some of these effects may only be detected by using more sensitive measures, such as pupil dilation. The paper discusses theoretical and practical implications regarding the language entropy measure and the cognitive effects of bilingual experiences more generally, as well as how methodological choices can advance our understanding of these effects

The benefits of being bilingual: Working memory in bilingual Turkish–Dutch children

AbstractWhether bilingual children outperform monolingual children on visuospatial and verbal working memory tests was investigated. In addition, relations among bilingual proficiency, language use at home, and working memory were explored. The bilingual Turkish–Dutch children (n=68) in this study were raised in families with lower socioeconomic status (SES) and had smaller Dutch vocabularies than Dutch monolingual controls (n=52). Having these characteristics, they are part of an under-researched bilingual population. It was found that the bilingual Turkish–Dutch children showed cognitive gains in visuospatial and verbal working memory tests when SES and vocabulary were controlled, in particular on tests that require processing and not merely storage. These findings converge with recent studies that have revealed bilingual cognitive advantages beyond inhibition, and they support the hypothesis that experience with dual language management influences the central executive control system that regulates processing across a wide range of task demands. Furthermore, the results show that bilingual cognitive advantages are found in socioeconomically disadvantaged bilingual populations and suggest that benefits to executive control are moderated by bilingual proficiency

Can we predict non-response in developmental tasks? Assessing the longitudinal relation between toddlers' non-response and early academic skills

To date, virtually no studies have examined toddlers' non-response in developmental tasks. This study investigates data from 3667 toddlers to address (1) whether two aspects of non-response (completion and engagement) are separable, (2) how stable these aspects are from ages two to three, (3) how non-response relates to background characteristics, and (4) whether non-response at ages two and three predicts early academic skills at age six. Structural equation modelling shows that completion and engagement are separable constructs, relatively stable across age, and related to several background characteristics. Especially engagement predicts later academic performance. Results show that non-response in behavioural tasks in toddlers is not random, increasing the likelihood of sampling bias and lack of generalizability in developmental studies