How do verbal short-term memory and working memory relate to the acquisition of vocabulary and grammar? A comparison between first and second language learners

Developmental changes in brain activation during novel grammar learning in 8-25-year-olds

While it is well established that grammar learning success varies with age, the cause of this developmental change is largely unknown. This study examined functional MRI activation across a broad developmental sample of 165 Dutch-speaking individuals (8-25 years) as they were implicitly learning a new grammatical system. This approach allowed us to assess the direct effects of age on grammar learning ability while exploring its neural correlates. In contrast to the alleged advantage of children language learners over adults, we found that adults outperformed children. Moreover, our behavioral data showed a sharp discontinuity in the relationship between age and grammar learning performance: there was a strong positive linear correlation between 8 and 15.4 years of age, after which age had no further effect. Neurally, our data indicate two important findings: (i) during grammar learning, adults and children activate similar brain regions, suggesting continuity in the neural networks that support initial grammar learning; and (ii) activation level is age-dependent, with children showing less activation than older participants. We suggest that these age-dependent processes may constrain developmental effects in grammar learning. The present study provides new insights into the neural basis of age-related differences in grammar learning in second language acquisition.

The "Starting-Small" Effect in Phonology: Evidence From Biased Learning of Opaque and Transparent Vowel Harmony

The starting-small effect is a cognitive advantage in language acquisition when learners begin by generalizing on regularities from structurally simple and shorter tokens in a skewed input distribution. Our study explored this effect as a potential explanation for the biased learning of opaque and transparent vowel harmony. In opaque vowel harmony, feature agreement occurs strictly between adjacent vowels, and an intervening "neutral vowel" blocks long-distance vowel harmony. Thus, opaque vowel harmony could be acquired even if learners start with structurally simpler and more frequent disyllabic tokens. Alternatively, transparent vowel harmony can only be observed in longer tokens demonstrating long-distance agreement by skipping a neutral vowel. Opaque vowel harmony is predicted to be learned more efficiently due to its compatibility with local dependency acquired via starting-small learning. In two artificial grammar learning experiments, learners were exposed to both vowel harmony patterns embedded in an equal number of disyllabic and trisyllabic tokens or a skewed distribution with twice as many disyllabic tokens. In Exp I, learners' test performance suggests the consistently biased learning of local and opaque vowel harmony with starting-small learning. Furthermore, in Exp II, the acquired vowel harmony patterns varied significantly by working memory capacity with a balanced but not skewed input distribution, presumably because of the ease of cognitive demand with starting-small learning.

Predictive Validity of the NIH Toolbox Executive Function Measures with Developmental Extensions from Early Childhood to Third Grade Achievement

   The National Institutes of Health Toolbox includes two executive function measures: the Dimensional Change Card Sort (DCCS) and the Flanker Inhibitory Control and Attention Test. Developmental extension (Dext) versions were created with easier levels for younger and more disadvantaged children. Although research on early (E-Prime) and later (iPad) versions of the Dext measures demonstrated their short-term validity, this study investigated their longer-term predictive validity. Participants included 402 children (Mage = 55.02 months) who completed the DCCS-Dext and Flanker-Dext (E-Prime) during early childhood screening and achievement tests in the third grade. Both measures significantly predicted math and reading scores among diverse groups of children.

Inhibitory control and verb inflection in Italian preschool children

The study investigates whether Italian verbal inflectional morphology is associated with inhibitory control skills after controlling for receptive vocabulary and verbal working memory. A sample of Italian preschoolers aged 4;0 to 6;0 was assessed using a standardized inhibitory control task tapping two different inhibitory skills (response inhibition and interference suppression), and a morphological task requiring simple and complex inflections of verbs. The hierarchical multiple regression analyses showed that working memory and the interference suppression scores were significantly associated with complex inflections but not with simple inflections of the verbs.

Executive Functions and Morphological Awareness Explain the Shared Variance Between Word Reading and Listening Comprehension

Purpose

A large body of literature showed that word reading and listening comprehension-two proximal predictors of reading comprehension according to the simple view of reading-are related. Grounded on the direct and indirect effects model of reading (Kim, 2020a, 2020b, 2023), we examined the extent to which the relation is explained by domain-general cognitions or executive functions (working memory and attentional control) and emergent literacy skills (language and code-related skills including morphological awareness, phonological awareness, orthographic pattern recognition, letter naming fluency, and rapid automatized naming).

Method

Data were from English-speaking children in Grade 1 (N = 372; 52% boys; 60% White children, 26% African American children, 6% multiracial children, 6% Hispanic children, and 2% Asian American children).

Results

Results from structural equation models showed that word reading and listening comprehension were moderately related (.54). When working memory and attentional control were included as predictors, the relation became weaker (.39). When morphological awareness was additionally included, they were no longer related (.05). The other emergent literacy skills did not add explanatory power beyond executive functions and morphological awareness.

Conclusion

These results indicate that executive functions and morphological awareness largely explain the shared variance between word reading and listening comprehension for English-speaking beginning readers.

Cognitive predictors of language abilities in primary school children: A cascaded developmental view

This study investigated the longitudinal relationship between children's domain-general cognitive constraints underlying phonological and sentence processing development in a big sample of typically developing children. 104 children were tested on non-linguistic processing speed, phonological skills (phonological short term memory, phonological knowledge, phonological working memory), and sentence processing abilities (sentence repetition and receptive grammar) in 1^st grade (aged 6 to 6.5) and one year later. A cross-lagged structural equation model showed that non-linguistic processing speed was a concurrent predictor of phonological skills, and that phonology had a powerful effect on the child's sentence processing abilities concurrently and longitudinally, providing clear evidence for the role of domain-general processes in the developmental pathway of language. These findings support a cascaded cognitive view of language development and pose important challenges for evaluation and intervention strategies in childhood.

The first year in formal schooling improves working memory and academic abilities

Neurocognition and academic abilities during the period of 4 and 7 years of age are impacted by both the transition from kindergarten to primary school and age-related developmental processes. Here, we used a school cut-off design to tease apart the impact of formal schooling from age, on working memory (WM) function, vocabulary, and numeracy scores. We compared two groups of children with similar age, across two years: first-graders (FG), who were enrolled into primary school the year that they became eligible and kindergarteners (KG), who were deferred school entry until the following year. All children completed a change detection task while brain activation was recorded using portable functional near-infrared spectroscopy, a vocabulary assessment, and a numeracy screener. Our results revealed that FG children showed greater improvement in WM performance and greater engagement of a left-lateralized fronto-parietal network compared to KG children. Further, they also showed higher gains in vocabulary and non-symbolic numeracy scores. This improvement in vocabulary and non-symbolic numeracy scores following a year in primary school was predicted by WM function. Our findings contribute to a growing body of literature examining neurocognitive and academic benefits conferred to children following exposure to formal schooling.

Association of PPP1R1B polymorphisms with working memory in healthy Han Chinese adults

Aims

The dopamine- and cAMP-regulated phosphoprotein (DARPP-32), which is encoded by the PPP1R1B gene, plays a converging regulatory role in the central nervous system by mediating the actions of dopamine, serotonin, and glutamate. Previous studies have demonstrated that variations in genes related to the dopamine system influence working memory. The present study thus investigated whether polymorphisms in PPP1R1B gene were associated with working memory.

Materials and methods

A sample of 124 healthy Han Chinese were genotyped for three single nucleotide polymorphisms of PPP1R1B gene, namely rs12601930C/T, rs879606A/G, and rs3764352A/G, using polymerase chain reaction and restriction fragment length polymorphism analysis. Working memory performance was assessed using the Wisconsin Card Sorting Test (WCST).

Results

Significant differences were observed in the Total Correct (TC), Total Errors (TE), and Conceptual Level Responses (CLR) scores of the WCST among the three rs12601930C/T genotypes (p = 0.044, 0.044, and 0.047, respectively); in TC, TE, Non-Perseverative Errors (NPE), and CLR scores between participants with the CC and (CT + TT) rs12601930C/T polymorphism genotypes (p = 0.032, 0.032, 0.019, and 0.029, respectively); in TC, TE, Perseverative Errors (PE), NPE, and CLR scores between participants with the (CT + CC) and TT rs12601930C/T polymorphism genotypes (p = 0.001, 0.001, 0.011, 0.004, and 0.001, respectively); and in NPE and CLR scores between participants with the GG and (AG + AA) genotypes of the rs3764352A/G polymorphism (p = 0.011 and 0.010). Furthermore, for males only, there were significant differences in TC, TE, PE, NPE, and CLR scores among the rs12601930C/T genotypes (p = 0.020, 0.020, 0.037, 0.029, and 0.014, respectively) and NPE and CLR scores among the rs3764352 genotypes (p = 0.045 and 0.042).

Conclusion

PPP1R1B gene polymorphisms rs12601930C/T and rs3764352A/G might be associated with working memory assessed by the WCST in healthy Chinese adults, especially among males.

The Directionality of the Relationship Between Executive Functions and Language Skills: A Literature Review

It has been demonstrated that executive functions play a significant role in different aspects of the development of children. Development of language is also one of the most important accomplishments of the preschool years, and it has been linked to many outcomes in life. Despite substantial research demonstrating the association between executive function and language development in childhood, only a handful of studies have examined the direction of the developmental pathways between EF skills and language skills, therefore little is known about how these two constructs are connected. In this review paper, we discuss three possible directional relationships between EFs and language development throughout childhood. First, we discuss how EF might affect language functioning. Next, we discuss how language functioning might affect EF. Lastly, we consider other possible relationships between EF and language. Given that children with better EF and language skills are more likely to succeed in educational settings and demonstrate greater social–emotional competencies, investigating the relationship between EF and language in the preschool period provides insight into mechanisms that have not been extensively studied. Furthermore, it could create new opportunities for designing effective and efficient interventions aimed at addressing EF and language deficits during the preschool period which could in turn influence later development.

Adolescent neighborhood disadvantage and memory performance in young adulthood

OBJECTIVE

Using data from the National Longitudinal Study of Adolescent to Adult Health, we estimated the average causal effect of neighborhood disadvantage in adolescence on memory performance in young adulthood. We contrasted several different ways of operationalizing a continuous measure of neighborhood disadvantage including a continuous neighborhood disadvantage score and ordinal measures.

RESULTS

Neighborhood disadvantage was measured in Wave I when participants were a mean age of 15.41 years (SE: 0.12) and memory performance was measured in Wave IV when participants were a mean age of 28.24 years (SE: 0.12). We found that adolescent neighborhood disadvantage was associated with decreased memory performance in young adulthood. Notably, we observed a linear decline in word recall score among those in the less disadvantaged tail of the distribution (neighborhood disadvantage <1), a finding not observed using traditional ordinal variable classifications of disadvantage.

CONCLUSION

Experiencing neighborhood disadvantage in adolescence may have lasting impacts on cognitive health throughout the life course.

Working Memory Predicts New Word Learning Over and Above Existing Vocabulary and Nonverbal IQ

PURPOSE

The purpose of this study was to use an established model of working memory in children to predict an established model of word learning to determine whether working memory explained word learning variance over and above the contributions of expressive vocabulary and nonverbal IQ.

METHOD

One hundred sixty-seven English-speaking second graders (7- to 8-year-olds) with typical development from two states participated. They completed a comprehensive battery of working memory assessments and six word learning tasks that assessed the creation, storage, retrieval, and production of phonological and semantic representations of novel nouns and verbs and the ability to link those representations.

RESULTS

A structural equation model with expressive vocabulary, nonverbal IQ, and three working memory factors predicting two word learning factors fit the data well. When working memory factors were entered as predictors after expressive vocabulary and nonverbal IQ, they explained 45% of the variance in the phonological word learning factor and 17% of the variance in the semantic word learning factor. Thus, working memory explained a significant amount of word learning variance over and above expressive vocabulary and nonverbal IQ.

CONCLUSION

Results show that working memory is a significant predictor of dynamic word learning over and above the contributions of expressive vocabulary and nonverbal IQ, suggesting that a comprehensive working memory assessment has the potential to identify sources of word learning difficulties and to tailor word learning interventions to a child's working memory strengths and weaknesses.

SUPPLEMENTAL MATERIAL

https://doi.org/10.23641/asha.19125911.

Längsschnittliche Zusammen­hänge von Wortschatz, Grammatik und Leseverständnis mit mathematischen Fähigkeiten bei Grundschulkindern mit nicht-deutscher Familiensprache

Zusammenfassung. Ein wesentlicher Erklärungsfaktor für die geringeren mathematischen Leistungen von Lernenden nicht-deutscher Familiensprache sind ihre weniger gut ausgeprägten sprachlichen Kompetenzen in der Instruktionssprache. Allerdings fehlt es an Untersuchungen, welche die längsschnittlichen Zusammenhänge zwischen verschiedenen sprachlichen und mathematischen Fähigkeitsfacetten in dieser Population abbilden. Die Studie untersucht deshalb das komplexe Zusammenhangsgefüge zwischen Wortschatz- und Grammatikkenntnissen, Leseverständnis und den mathematischen Fähigkeiten in Arithmetik, Textaufgaben sowie Fachwortschatzkenntnissen an einer Stichprobe von 370 Grundschulkindern nicht-deutscher Familiensprache anhand eines Cross-Lagged-Panel-Designs mit drei Messzeitpunkten. Dabei zeigte sich unter Kontrolle der allgemeinen kognitiven Grundfähigkeiten und der Vorleistungen, dass allgemeine Wortschatzkenntnisse einen signifikanten Beitrag zur Vorhersage der Fähigkeit Textaufgaben zu lösen und der Fachwortschatzkenntnisse leisteten (kreuzverzögerte Pfade). Gleichzeitig erwies sich Grammatikkompetenz als signifikanter Prädiktor für spätere Fachwortschatzkenntnisse. Die untersuchten sprachlichen Teilkompetenzen hatten hingegen keinen Vorhersagewert für die spätere Arithmetikleistung. Ein reziproker Effekt konnte für Fachwortschatz und den allgemeinen Wortschatz gefunden werden. Signifikante Zusammenhänge der Residuen von Textaufgaben und Fachwortschatz mit den Residuen der sprachlichen Fähigkeitsfacetten zum zweiten und dritten Messzeitpunkt weisen darauf hin, dass die Leistungszuwächse miteinander assoziiert sind.

Desirable Difficulties in Language Learning? How Talker Variability Impacts Artificial Grammar Learning

Contending with talker variability has been found to lead to processing costs but also benefits by focusing learners on invariant properties of the signal, indicating that talker variability acts as a desirable difficulty. That is, talker variability may lead to initial costs followed by long-term benefits for retention and generalization. Adult participants learned an artificial grammar affording learning of multiple components in two experiments varying in difficulty. They learned from one, two, or eight talkers and were tested at three time points. The eight-talker condition did not impact learning. The two-talker condition negatively impacted some aspects of learning, but only under more difficult conditions. Generalization of the grammatical dependency was difficult. Thus, we discovered that high and limited talker variability can differentially impact artificial grammar learning. However, talker variability did not act as a desirable difficulty in the current paradigm as the few evidenced costs were not related to long-term benefits.

PROTOCOL: Language interventions for improving the L1 and L2 development of dual language learners in early education and care: A systematic review and meta-analysis

The aim of the current systematic review and meta-analysis is to comprehensively synthesize the effectiveness of language promotion interventions in early childhood education and care (ECEC) settings on L1 and L2 development of dual language learners (DLLs). We will use the PICOC-Strategy (Population, Intervention, Comparison, Outcome, Context) suggested by Petticrew et al. to frame our research questions. Specifically, this review has the following research questions: (1) To which extent do language interventions accomplished in ECEC settings effect the L2 development (in the society language) of DLLs? (2) To which extent do bilingual language interventions (with L1 as language of instruction) accomplished in ECEC effect the L1 development (in the family language) of DLLs? (3) Are there significant differences in the effectiveness of different language interventions (additive vs. integrated vs. bilingual/two-way-immersion) to promote the L2 development of DLLs? (4) Are language interventions accomplished in ECEC settings more effective in supporting the L2 development (in the society language) of DLLs, when they start early in life (before the age of three)? (5) Are language interventions more effective in supporting the L2 development (in the society language) of DLLs when they are implemented with high fidelity/high quality? (6) Are language interventions with teachers as implementers more effective in supporting the L2 development (in the society language) of DLLs than language interventions with external implementers? (7) Are language interventions with higher intervention dosage (exposure × attention) more effective in supporting the L2 development (in the society language) of DLLs?

Language acquisition of early sequentially bilingual children is moderated by short-term memory for order in developmental language disorder: Findings from the HelSLI study

BACKGROUND

The role of domain-general short-term memory (STM) in language development remains controversial. A previous finding from the HelSLI study on children with developmental language disorder (DLD) suggested that not only verbal but also non-verbal STM for temporal order is related to language acquisition in monolingual children with DLD.

AIMS

To investigate if a similar relationship could be replicated in a sample of sequentially bilingual children with DLD. In addition to the effect of age, the effect of cumulative second language (L2) exposure was studied.

METHODS & PROCEDURES

Sixty-one 4-6-year-old bilingual children with DLD and 63 typically developing (TD) bilingual children participated in a cross-sectional study conducted in their L2. Children completed novel game-like tests of visual and auditory non-verbal serial STM, as well as tests of cognitive functioning and language. Interactions of STM for order with age and exposure to L2 (Finnish) were explored as explanatory variables.

OUTCOMES & RESULTS

First, the improvement of non-verbal serial STM with age was faster in sequentially bilingual TD children than in bilingual children with DLD. A similar effect was observed for L2 exposure. However, when both age and exposure were considered simultaneously, only age was related to the differential growth of non-verbal STM for order in the groups. Second, only in children with DLD was better non-verbal serial STM capacity related to an improvement in language scores with age and exposure.

CONCLUSIONS & IMPLICATIONS

The results suggest that, as previously found in Finnish monolingual children, domain-general serial STM processing is also compromised in bilingual children with DLD. Further, similar to the monolingual findings, better non-verbal serial STM was associated with greater language improvement with age and exposure, but only in children with DLD, in the age range studied here. Thus, in clinical settings, assessing non-verbal serial STM of bilingual children could improve the detection of DLD and understanding of its non-linguistic symptoms.

WHAT THIS PAPER ADDS

What is already known on the subject Both phonological and non-verbal STM have been associated with DLD in monolingual and sequentially bilingual children. Monolingual children with DLD have also shown slower non-verbal serial STM development than TD children. What this study adds to existing knowledge Sequentially bilingual TD children's non-verbal serial STM improves more between ages 4 and 7 years than that of their peers with DLD, replicating a finding for monolingual children with DLD. Better non-verbal serial STM was especially associated with early receptive language development in sequentially bilingual children with DLD. L2 exposure showed largely comparable effects with age. These results support the hypothesis that a domain-general serial STM deficit is linked to DLD. What are the potential or actual clinical implications of this work? Non-verbal assessment of STM for serial order in sequentially bilingual children with DLD could benefit the development of better tailored therapeutic interventions.

Cognitive and Linguistic Skills Associated With Cross-Linguistic Transfer in the Production of Oral Narratives in English as a Foreign Language by Arabic- and Hebrew-Speaking Children: Finding Common Denominators

Many studies have examined literacy and related skills among learners of English as a foreign language (EFL), but little attention has been given to the role of oral language within a cross-linguistic framework despite the fact that English is the most widely spoken additional language today. Oral narratives rely on lexical, morphosyntactic, and conceptual knowledge. An in-depth examination of this modality can shed light on specific associations between cognitive and linguistic L1 and EFL skills and suggest possible mediating variables that assist multilingual speakers in producing complete oral narratives in EFL. The present study examined L1 and EFL contributors to EFL oral narratives produced by native Arabic (n = 85) and Hebrew (n = 86) speaking sixth graders seeking to identify cross-linguistic influences. We assessed general cognitive skills, phonological memory (PM), lexical, morphosyntactic knowledge, and reading comprehension in L1 (Hebrew speakers), Modern Standard Arabic (MSA, L2), L3 Hebrew (for Arabic speakers) and EFL. The “Cookie Theft” task assessed EFL elicited narratives using modified narrative analysis scales to account for microstructure (lexical and morphosyntactic complexity) and macrostructure (understanding story elements), generating a Total Narrative score. Our results yielded different patterns of underlying psycholinguistic profiles, and cross and within language associations for each group. Strong interactions between L1, L2/L3, and EFL morphological awareness and reading comprehension suggested cross-linguistic transfer. Regression analysis identified the most influential skills supporting EFL narratives for each linguistic group: English reading comprehension (ERC) was essential for Hebrew speakers and English morphological awareness (EMA) for Arabic ones. These results suggested different allocations of cognitive and linguistic resources in EFL narratives. The results also allowed to identify a common mediating skill for both groups. Findings are discussed within the theoretical framework of the Interdependence Hypothesis, the Linguistic Proximity Model, as well as accounts of direct and indirect transfer, which illuminate the impact of typological distance, general language proficiency and components of linguistic knowledge on cross-linguistic transfer in EFL oral language production.

Short-Term Memory for Serial Order Moderates Aspects of Language Acquisition in Children With Developmental Language Disorder: Findings From the HelSLI Study

Previous studies of verbal short-term memory (STM) indicate that STM for serial order may be linked to language development and developmental language disorder (DLD). To clarify whether a domain-general mechanism is impaired in DLD, we studied the relations between age, non-verbal serial STM, and language competence (expressive language, receptive language, and language reasoning). We hypothesized that non-verbal serial STM differences between groups of children with DLD and typically developing (TD) children are linked to their language acquisition differences. Fifty-one children with DLD and sixty-six TD children participated as part of the HelSLI project in this cross-sectional study. The children were 4-6-year-old monolingual native Finnish speakers. They completed several tests of language and cognitive functioning, as well as new game-like tests of visual and auditory non-verbal serial STM. We used regression analyses to examine how serial STM moderates the effect of age on language. A non-verbal composite measure of serial visual and auditory STM moderated cross-sectional development of receptive language in the children with DLD. This moderation was not observed in the TD children. However, we found more rapid cross-sectional development of non-verbal serial STM in the TD children than in the children with DLD. The results suggest that children with DLD may be more likely to have compromised general serial STM processing and that superior non-verbal serial STM may be associated with better language acquisition in children with DLD.

Explicit but Not Implicit Memory Predicts Ultimate Attainment in the Native Language

The present paper examines the relationship between explicit and implicit memory and ultimate attainment in the native language. Two groups of native speakers of English with different levels of academic attainment (i.e., high vs. low) took part in three language tasks which assessed grammar, vocabulary and collocational knowledge, as well as phonological short-term memory (assessed using a forward digit-span task), explicit associative memory (assessed using a paired-associates task) and implicit memory (assessed using a deterministic serial reaction time task). Results revealed strong relationships between phonological short-term memory and explicit associative memory on the one hand and the three language tasks on the other hand, and no relation between linguistic performance and implicit memory. Taken together, these results cast doubts on the common assumption that L1 grammar learning depends almost entirely on implicit memory and align with the claims of usage-based models of language acquisition that grammatical and lexical knowledge depend on the same cognitive mechanisms.

Relationship between working memory and complex syntax in children with Developmental Language Disorder

Some theories of Developmental Language Disorder (DLD) explain the linguistic deficits observed in terms of limitations in non-linguistic cognitive systems such as working memory. The goal of this research is to clarify the relationship between working memory and the processing of complex sentences by exploring the performance of 28 French-speaking children with DLD aged five to fourteen years and 48 typically developing children of the same age in memory and linguistic tasks. We identified predictive relationships between working memory and the comprehension and repetition of complex sentences in both groups. As for syntactic measures in spontaneous language, it is the complex spans that explain the major part of the variance in the control children. In children with DLD, however, simple spans are predictive of these syntactic measures. Our results thus reveal a robust relationship between working memory and syntactic complexity, with clinical implications for the treatment of children with DLD.

Toward Integrative Reading Science: The Direct and Indirect Effects Model of Reading

The authors propose an integrative theoretical model of reading called the direct and indirect effects model of reading (DIER) that builds on and extends several prominent theoretical models of reading. According to DIER, the following skills and knowledge are involved in reading comprehension: word reading, listening comprehension, text reading fluency, background knowledge (content knowledge and discourse knowledge), reading affect or socioemotions, higher order cognitions and regulation (e.g., inference, perspective taking, reasoning, and comprehension monitoring), vocabulary, grammatical (morphosyntactic and syntactic) knowledge, phonology, morphology, orthography, and domain-general cognitions (e.g., working memory and attentional control). Importantly, DIER also describes the nature of structural relations-component skills are hypothesized to have (a) hierarchical relations; (b) dynamic (or differential) relations as a function of text, activity (including assessment), and development; and (c) interactive relations. The authors then examined the hierarchical relations hypothesis by comparing a flat or direct relations model with hierarchical relations (or direct and indirect effects) models. Structural equation model results from 201 Korean-speaking first graders supported the hierarchical relations hypothesis and revealed multichanneled direct and indirect effects of component skills. These results are discussed in light of DIER, including instructional and assessment implications for reading development and reading difficulties.

Stacking the evidence: Parents' use of acoustic packaging with preschoolers

Segmenting continuous events into discrete actions is critical for understanding the world. As infants may lack top-down knowledge of event structure, caregivers provide audiovisual cues to guide the process, aligning action descriptions with event boundaries to increase their salience. This acoustic packaging may be specific to infant-directed speech, but little is known about when and why the use of this cue wanes. We explore whether acoustic packaging persists in parents' teaching of 2.5-5.5-year-old children about various toys. Parents produced a smaller percentage of action speech relative to studies with infants. However, action speech largely remained more aligned to action boundaries relative to non-action speech. Further, for the more challenging novel toys, parents modulated their use of acoustic packaging, providing it more for those children with lower vocabularies. Our findings suggest that acoustic packaging persists beyond interactions with infants, underscoring the utility of multimodal cues for learning, particularly for less knowledgeable learners in challenging learning environments.

Individual differences in lexical learning across two language modalities: Sign learning, word learning, and their relationship in hearing non-signing adults

A considerable amount of research has been devoted to understanding individual differences in lexical learning, however, the majority of this research has been conducted with spoken languages rather than signed languages and thus we know very little about the cognitive processes involved in sign learning or the extent to which lexical learning processes are specific to word learning. The present study was conducted to address this gap. Two-hundred thirty-six non-signing adults completed 25 tasks assessing word learning and sign learning (via associative learning paradigms) as well as modality-specific phonological short-term memory, working memory capacity, crystallized intelligence, and fluid intelligence. Latent variable analyses indicated that, when other variables were held constant, fluid intelligence was predictive of both word and sign learning, however, modality-specific phonological short-term memory factors were only predictive of lexical learning within modality-none of the other variables made significant independent contributions. It was further observed that sign and word learning were strongly correlated. Exploratory analyses revealed that all lexical learning tasks loaded onto a general factor, however, sign learning tasks loaded onto an additional specific factor. As such, this study provides insight into the cognitive components that are common to associative L2 lexical learning regardless of language modality and those that are unique to either signed or spoken languages. Results are further discussed in light of established and more recent theories of intelligence, short-term memory, and working memory.

The Role of Working Memory, Language Proficiency, and Learners' Age in Second Language English Learners' Processing and Comprehension of Anaphoric Sentences

This study is designed to explore the role of second language (L2) English learners' working memory (WM), language proficiency, and age in the processing and comprehension of English anaphoric sentences. To this end, 40 EFL learners participated in the study. The proficiency levels of the participants varied from elementary to high-intermediate, as measured by the Quick Placement Test. A first-language Operation Span Task and a self-paced reading task were employed to measure the participants' WM capacity and anaphoric sentence processing and comprehension respectively. The results of standard multiple regression analyses revealed that 36% of the variation in anaphoric processing, and 70% of variation in anaphoric sentences comprehension could be accounted for by the independent variables of the study, with the composite WM as the only significant predictor. Moreover, both components of WM, i.e. WM processing and WM storage, significantly predicted 36% and 72% of variation in anaphoric processing and comprehension respectively; with the WM processing having a greater contribution in both cases. The findings of the study provide empirical evidence on the significant role of WM on anaphoric resolution.

Does Exposure to Code-Switching Influence Language Performance in Bilingual Children?

This study investigated whether the effect of exposure to code-switching on bilingual children's language performance varied depending on verbal working memory (WM). A large sample of school-aged Spanish-English bilingual children (N = 174, M_age  = 7.78) was recruited, and children were administered language measures in English and Spanish. The frequency with which the children were exposed to code-switching was gathered through parent report. For children with high verbal WM, greater exposure to code-switching was associated with higher levels of language ability. In contrast, for children with lower verbal WM, greater exposure to code-switching was associated with lower levels of language ability. These findings indicate that children's cognitive processing capacity dictates whether exposure to code-switching facilitates or hinders language skills.

Linguistic Skills in Bilingual Children With Developmental Language Disorders: A Pilot Study

The current pilot study compared the linguistic characteristics of a cohort of simultaneous bilingual children (Italian, L1; German L2) with developmental language disorders (DLDs) and those of bilingual peers with typical language development (TLD). Importantly, the two groups were balanced for a number of environmental variables (e.g., age of first exposure to the L2, acquisition contexts, degree of exposure to both languages) known to affect linguistic development in both TLD and DLDs. The analyses included the assessment of the participants' phonological short-term memory. Their lexical, grammatical and narrative abilities were analyzed in both languages by administering the Italian and German equivalent forms of the Battery for the assessment of language in children aged 4 to 12 - BVL_4-12 (Marini et al., 2015). The children with DLDs had reduced phonological short-term memory and lexical skills that, in turn, contributed to the reduced levels of local coherence and informativeness of their narratives. Such difficulties were found at similar levels in their two languages. These results suggest that reduced phonological short-term memory and lexical selection skills may reflect a core symptom in both mono- and bilingual children with developmental language disorders.

Dual Language Competencies of Turkish-German Children Growing Up in Germany: Factors Supportive of Functioning Dual Language Development

This paper is about the first (L1) and second language (L2) skills of Turkish-German dual language learners (DLLs), the interrelatedness of the L1 and L2 skills, and their relation to other selected child and family variables. The first aim of the study was to examine L1 and L2 performance and the relation between the languages. Second, the study sought to explore the conditions in which functioning dual language development can be achieved, while trying to predict the extent to which child and environmental factors are related to the DLLs' language competencies. L1 and L2 language skills of N = 69 bilingually developing 3-5 years old Turkish-German children were assessed via standardized tests. In addition, information on the children's sociodemographic variables and home language environments was obtained by means of parental questionnaires. Correlational analyses were used to examine the interrelations between L1 and L2 skills and multiple regression analyses were conducted in order to predict the children's language competencies. The children showed age-appropriate language skills in L1 (Turkish) and lower language skills in L2 (German). Whereas their phonological memory abilities were positively correlated with L1 and L2 skills, their expressive vocabulary in L1 was negatively correlated with L2 skills. Our findings also indicated that phonological memory was a strong predictor of language abilities. Concerning family variables, both early daycare entry and stimulating home language environment were significant predictors of better L2 skills. Lastly, balanced use of both languages at home had no negative consequences on language competencies. Although more research is needed, this study shows the benefits of using a combined language measure including both L1 and L2 skills to predict DLLs' language competencies without disregarding either of their languages.

Phrase-Final Words in Greek Storytelling Speech: A Study on the Effect of a Culturally-Specific Prosodic Feature on Short-Term Memory

Prosodic patterns of speech appear to make a critical contribution to memory-related processing. We considered the case of a previously unexplored prosodic feature of Greek storytelling and its effect on free recall in thirty typically developing children between the ages of 10 and 12 years, using short ecologically valid auditory stimuli. The combination of a falling pitch contour and, more notably, extensive final-syllable vowel lengthening, which gives rise to the prosodic feature in question, led to statistically significantly higher performance in comparison to neutral phrase-final prosody. Number of syllables in target words did not reveal substantial difference in performance. The current study presents a previously undocumented culturally-specific prosodic pattern and its effect on short-term memory.

Dyslexia as a multi-deficit disorder: Working memory and auditory temporal processing

Dyslexia is difficulty in acquiring reading skills despite adequate intelligence and sufficient reading opportunities. Its origin is still under debate. Studies usually focus on a singular cause for dyslexia; however, some researchers argue that dyslexia reflects multiple deficits. Two of the abilities under investigation in dyslexia are working memory (WM) and auditory temporal processing (ATP). In order to better evaluate the relative roles of WM and ATP in dyslexia, in the present study, we tested the contribution of WM and ATP to different types of reading performance and phonological awareness in dyslexia, using a multidimensional approach. Seventy-eight adults with dyslexia and 23 normal-reading adults performed WM and ATP tasks, as well as reading and phonological awareness tests. Readers with dyslexia showed poorer performance on all tests. Both WM and ATP were significant predictors of reading performance and phonological awareness among participants with dyslexia. Dividing participants with dyslexia according to their performance level on WM and ATP tasks revealed group differences in reading and phonological awareness tests. Both WM and ATP contribute to dyslexia, and varying levels of difficulties in both of these abilities are observed among this population. This is strong evidence in favor of the multi-deficit approach in dyslexia, and suggests that researchers should consider this approach in future studies of dyslexia.

The Role of Phonological Working Memory and Environmental Factors in Lexical Development in Italian-Speaking Late Talkers: A One-Year Follow-Up Study

PURPOSE

This follow-up study assessed (a) the influence of phonological working memory (pWM), home literacy environment, and a family history of linguistic impairments in late talkers (LTs); (b) the diagnostic accuracy of a task of nonword repetition (NWR) in identifying LTs; and (c) the persistence of lexical weaknesses after 10 months.

METHOD

Two hundred ninety-three children were assessed at approximately 32 (t1) and 41 (t2) months. At t1, they were administered the Italian adaptation of the Language Development Survey, an NWR task (used to assess pWM), and questionnaires assessing home literacy environment and family history of language impairments. Thirty-three LTs were identified. The linguistic skills of the participants were evaluated at t2 by administering tasks assessing Articulation, Naming, Semantic Fluency, and Lexical Comprehension.

RESULTS

At t2, LTs performed more poorly as compared with age-matched typically developing peers in articulatory and naming skills, had reduced lexical comprehension abilities, and had limited lexical knowledge. Their performance on the NWR task at t1 correlated with the extension of their vocabularies at t2 (as estimated with a Semantic Fluency task).

CONCLUSIONS

The Language Development Survey recently adapted to Italian is sensitive to LTs. Former LTs still have a mild lexical delay at approximately 40 months. As an indirect measure of pWM, the task of NWR is an early indicator of future lexical deficits.

Verbal Working Memory Is Related to the Acquisition of Cross-Linguistic Phonological Regularities

Closely related languages share cross-linguistic phonological regularities, such as Frisian -âld [ͻ:t] and Dutch -oud [ʱut], as in the cognate pairs kâld [kͻ:t] – koud [kʱut] ‘cold’ and wâld [wͻ:t] – woud [wʱut] ‘forest’. Within Bybee’s (1995, 2001, 2008, 2010) network model, these regularities are, just like grammatical rules within a language, generalizations that emerge from schemas of phonologically and semantically related words. Previous research has shown that verbal working memory is related to the acquisition of grammar, but not vocabulary. This suggests that verbal working memory supports the acquisition of linguistic regularities. In order to test this hypothesis we investigated whether verbal working memory is also related to the acquisition of cross-linguistic phonological regularities. For three consecutive years, 5- to 8-year-old Frisian-Dutch bilingual children (n = 120) were tested annually on verbal working memory and a Frisian receptive vocabulary task that comprised four cognate categories: (1) identical cognates, (2) non-identical cognates that either do or (3) do not exhibit a phonological regularity between Frisian and Dutch, and (4) non-cognates. The results showed that verbal working memory had a significantly stronger effect on cognate category (2) than on the other three cognate categories. This suggests that verbal working memory is related to the acquisition of cross-linguistic phonological regularities. More generally, it confirms the hypothesis that verbal working memory plays a role in the acquisition of linguistic regularities.

How Does L1 and L2 Exposure Impact L1 Performance in Bilingual Children? Evidence from Polish-English Migrants to the United Kingdom

Most studies on bilingual language development focus on children's second language (L2). Here, we investigated first language (L1) development of Polish-English early migrant bilinguals in four domains: vocabulary, grammar, phonological processing, and discourse. We first compared Polish language skills between bilinguals and their Polish non-migrant monolingual peers, and then investigated the influence of the cumulative exposure to L1 and L2 on bilinguals' performance. We then examined whether high exposure to L1 could possibly minimize the gap between monolinguals and bilinguals. We analyzed data from 233 typically developing children (88 bilingual and 145 monolingual) aged 4;0 to 7;5 (years;months) on six language measures in Polish: receptive vocabulary, productive vocabulary, receptive grammar, productive grammar (sentence repetition), phonological processing (non-word repetition), and discourse abilities (narration). Information about language exposure was obtained via parental questionnaires. For each language task, we analyzed the data from the subsample of bilinguals who had completed all the tasks in question and from monolinguals matched one-on-one to the bilingual group on age, SES (measured by years of mother's education), gender, non-verbal IQ, and short-term memory. The bilingual children scored lower than monolinguals in all language domains, except discourse. The group differences were more pronounced on the productive tasks (vocabulary, grammar, and phonological processing) and moderate on the receptive tasks (vocabulary and grammar). L1 exposure correlated positively with the vocabulary size and phonological processing. Grammar scores were not related to the levels of L1 exposure, but were predicted by general cognitive abilities. L2 exposure negatively influenced productive grammar in L1, suggesting possible L2 transfer effects on L1 grammatical performance. Children's narrative skills benefitted from exposure to two languages: both L1 and L2 exposure influenced story structure scores in L1. Importantly, we did not find any evidence (in any of the tasks in which the gap was present) that the performance gap between monolinguals and bilinguals could be fully closed with high amounts of L1 input.

English Verb Accuracy of Bilingual Cantonese-English Preschoolers

Purpose

Knowledge of verb development in typically developing bilingual preschoolers may inform clinicians about verb accuracy rates during the 1st 2 years of English instruction. This study aimed to investigate tensed verb accuracy in 2 assessment contexts in 4- and 5-year-old Cantonese-English bilingual preschoolers.

Method

The sample included 47 Cantonese-English bilinguals enrolled in English preschools. Half of the children were in their 1st 4 months of English language exposure, and half had completed 1 year and 4 months of exposure to English. Data were obtained from the Test of Early Grammatical Impairment (Rice & Wexler, 2001) and from a narrative generated in English.

Results

By the 2nd year of formal exposure to English, children in the present study approximated 33% accuracy of tensed verbs in a formal testing context versus 61% in a narrative context. The use of the English verb BE approximated mastery. Predictors of English third-person singular verb accuracy were task, grade, English expressive vocabulary, and lemma frequency.

Conclusions

Verb tense accuracy was low across both groups, but a precocious mastery of BE was observed. The results of the present study suggest that speech-language pathologists may consider, in addition to an elicitation task, evaluating the use of verbs during narratives in bilingual Cantonese-English bilingual children.

Short-Term Storage and Executive Working Memory Processing Predict Fluid Intelligence in Primary School Children

Working memory (WM) includes short-term storage and executive processing of information. WM has been suggested to be one of the key concepts to explain individual differences in fluid intelligence (Gf). However, only a few studies have investigated the association of the two different aspects of WM in relation to Gf. Furthermore, even fewer studies have included children. Therefore, we first investigated the inter-relations between the WM aspects (verbal and visual-spatial storage, verbal and visual-spatial executive processing). Second, we explored the relation between a general WM factor and Gf. Third, we analyzed the relations between the different WM aspects and Gf while we controlled for common variance among all WM tasks. Nine- to 11-year olds had to solve simple and complex span tasks. Correlations and structural equation modeling techniques were used to examine these relations. Most inter-relations among simple and complex spans were found to be substantial and positive. The general WM factor was related to Gf. Furthermore, after controlling for common variance among all WM tasks, individual differences in verbal storage, visual-spatial storage and verbal processing still uniquely related to Gf. Visual-spatial processing, however, was not related to Gf. Results are discussed in terms of underlying mechanisms.

Examining the predictive relations between two aspects of self-regulation and growth in preschool children's early literacy skills

There is strong evidence that self-regulatory processes are linked to early academic skills, both concurrently and longitudinally. The majority of extant longitudinal studies, however, have been conducted using autoregressive techniques that may not accurately model change across time. The purpose of this study was to examine the unique associations between 2 components of self-regulation, attention and executive functioning (EF), and growth in early literacy skills over the preschool year using latent-growth-curve analysis. The sample included 1,082 preschool children (mean age = 55.0 months, SD = 3.73). Children completed measures of vocabulary, syntax, phonological awareness, print knowledge, cognitive ability, and self-regulation, and children's classroom teachers completed a behavior rating measure. To examine the independent relations of the self-regulatory skills and cognitive ability with children's initial early literacy skills and growth across the preschool year, growth models in which the intercept and slope were simultaneously regressed on each of the predictor variables were examined. Because of the significant relation between intercept and slope for most outcomes, slope was regressed on intercept in the models to allow a determination of direct and indirect effects of the predictors on growth in children's language and literacy skills across the preschool year. In general, both teacher-rated inattention and directly measured EF were uniquely associated with initial skills level; however, only teacher-rated inattention uniquely predicted growth in early literacy skills. These findings suggest that teacher ratings of inattention may measure an aspect of self-regulation that is particularly associated with the acquisition of academic skills in early childhood. (PsycINFO Database Record