Developmental Language Disorder Group Research Articles

Application of symbolic play test in identification of autism spectrum disorder without global developmental delay and developmental language disorder

BackgroundChildren with autism spectrum disorders (ASD) usually experience difficulty regarding symbolic play. However, studies on whether symbolic play test (SPT) can differentiate between ASD and other developmental disorders are inconsistent, and evaluating the application value of the SPT in the identification of ASD without global developmental delay (GDD) and developmental language disorder (DLD) is necessary.MethodsA total of 200 children were selected as the research participants. There were 100 cases of ASD without GDD and 100 cases of DLD. All children were tested by SPT and Children Neuropsychological and Behavioral Scale-Revision (CNBS-R2016). Binomial logistic regression was used for multivariate analysis. The receiver operating characteristic (ROC) curve was used to evaluate the value of SPT in identifying ASD without GDD and DLD.ResultsSPT equivalent age was lower than chronological age in the two groups, the difference between the ASD without GDD group was greater than that in the DLD group, and the proportion of SPT equivalent age retardation was higher than that in the DLD group; the differences were statistically significant. Logistic regression analysis showed that there was a difference in SPT equivalent age between DLD and ASD without GDD. When the cut-off value of the SPT was 8.5, the largest area under the ROC curve was 0.723, and the sensitivity and specificity for the diagnosis of ASD without GDD were 0.720 and 0.620 respectively.ConclusionsSymbolic play ability in ASD children is worse than that of DLD children at comparable development levels. SPT may be helpful to distinguish ASD without GDD from children with DLD.

Functional near-infrared spectroscopy measures of neural activity in children with and without developmental language disorder during a working memory task.

Children with developmental language disorder (DLD) exhibit cognitive deficits that interfere with their ability to learn language. Little is known about the functional neuroanatomical differences between children developing typically (TD) and children with DLD. Using functional near-infrared spectroscopy, we recorded oxygenated hemoglobin (O2 hb) concentration values associated with neural activity in children with and without DLD during an auditory N-back task that included 0-back, 1-back, and 2-back conditions. Analyses focused on the left dorsolateral prefrontal cortex (DLPFC) and left inferior parietal lobule (IPL). Multilevel models were constructed with accuracy, response time, and O2 hb as outcome measures, with 0-back outcomes as fixed effects to control for sustained attention. Children with DLD were significantly less accurate than their TD peers at both the 1-back and 2-back tasks, and they demonstrated slower response times during 2-back. In addition, children in the TD group demonstrated significantly greater sensitivity to increased task difficulty, showing increased O2 hb to the IPL during 1-back and to the DLPFC during the 2-back, whereas the DLD group did not. A secondary analysis revealed that higher O2 hb in the DLPFC predicted better task accuracy across groups. When task difficulty increased, children with DLD failed to recruit the DLPFC for monitoring information and the IPL for processing information. Reduced memory capacity and reduced engagement likely contribute to the language learning difficulties of children with DLD.

Using Motor Tempi to Understand Rhythm and Grammatical Skills in Developmental Language Disorder and Typical Language Development.

Children with developmental language disorder (DLD) show relative weaknesses on rhythm tasks beyond their characteristic linguistic impairments. The current study compares preferred tempo and the width of an entrainment region for 5- to 7-year-old typically developing (TD) children and children with DLD and considers the associations with rhythm aptitude and expressive grammar skills in the two populations. Preferred tempo was measured with a spontaneous motor tempo task (tapping tempo at a comfortable speed), and the width (range) of an entrainment region was measured by the difference between the upper (slow) and lower (fast) limits of tapping a rhythm normalized by an individual's spontaneous motor tempo. Data from N = 16 children with DLD and N = 114 TD children showed that whereas entrainment-region width did not differ across the two groups, slowest motor tempo, the determinant of the upper (slow) limit of the entrainment region, was at a faster tempo in children with DLD vs. TD. In other words, the DLD group could not pace their slow tapping as slowly as the TD group. Entrainment-region width was positively associated with rhythm aptitude and receptive grammar even after taking into account potential confounding factors, whereas expressive grammar did not show an association with any of the tapping measures. Preferred tempo was not associated with any study variables after including covariates in the analyses. These results motivate future neuroscientific studies of low-frequency neural oscillatory mechanisms as the potential neural correlates of entrainment-region width and their associations with musical rhythm and spoken language processing in children with typical and atypical language development.

Not only motor skill performance but also haptic function is impaired in children with developmental language disorder

BackgroundPrevious studies have found an association between motor immaturity and developmental language impairment in children. However, systematic investigations of somatosensory dysfunctions that might be linked to motor deficits in children with developmental language disorder (DLD) are lacking. AimsExamined haptic perception and motor skills in school-age children with DLD and typically-developing (TD) children. MethodsSixteen children with DLD and sixteen age-matched TD children performed a curvature detection task measuring haptic sensitivity and a curvature discrimination task measuring haptic acuity. The Movement Assessment Battery for Children, 2nd edition (MABC-2) was also conducted to evaluate children’s motor ability. ResultsThe results revealed elevated thresholds of both haptic detection (67.5%) and haptic discrimination (67.9%) in the DLD group when compared to the TD group. In addition, the children with DLD performed significantly less well on the manual dexterity of MABC-2. Finally, a lower haptic acuity was associated with poorer manual dexterity scores of MABC-2. ConclusionsThis study demonstrates for the first time that not only motor skills, but also haptic function is altered in children with DLD. The observed association between manual dexterity and haptic acuity suggests a close relationship between haptic and motor skills in school-age children.

Short report: Self-compassion and satisfaction with life in Danish adolescents with Developmental Language Disorder (DLD): `We are all in the same boat´

BackgroundAdolescents with Developmental Language Disorder (DLD) are at risk of emotional health problems and low self-esteem. However, little is known about their self-compassion (SC) and satisfaction with life (SWL). The present study compared self-compassion and satisfaction with life reported by Danish adolescents with DLD compared to typically developing (TD) peers, and whether severity of language difficulty is associated with SC and SWL. MethodsResults were obtained from 10 Danish adolescents with DLD compared with 14 age-matched TD adolescents and 132 TD peers, aged 15 years. ResultsFor SC and SWL results showed that adolescents with DLD reported more positive feelings compared to the TD adolescents. Interestingly for SC, the negative, but not the positive, domain differentiated the two groups, as adolescents with DLD reported less symptoms on self-judgment, isolation and overidentification. SC and SWL was strongly correlated with language abilities for the DLD group, but not for the TD group. ConclusionsResults from our pilot study showed that Danish adolescents with DLD reported being less harsh on themselves. Language abilities were associated with self-compassion for the DLD, but not for the TD group. Whether these group differences are due to environmental factors such as the specific Danish school setting of the DLD group or internal factors are discussed and requires further research.

Developmental Language Disorder Is Associated With Slower Processing Across Domains: A Meta-Analysis of Time-Based Tasks.

Individuals with developmental language disorder (DLD) often exhibit slower processing on time-based tasks in comparison with age-matched peers. Processing speed has been linked to various linguistic skills and might serve as a global indicator of individual differences in language abilities. Despite an extensive literature on processing speed in DLD, it remains unclear whether slower processing is domain general or restricted to linguistic and/or auditory tasks. This meta-analysis used robust variance estimation to compare response/reaction times (RTs) of DLD and age-matched groups (N = 812 DLD, 870 neurotypical; M age [DLD] = 8.9 years, range: 4.3-22.7 years). Moderators included task (simple RT, choice RT, naming, congruent/baseline conditions of interference control tasks), stimulus type (linguistic/nonlinguistic), stimulus modality (auditory/nonauditory), and response modality (verbal/nonverbal). Age and publication year were covariates. The overall effect based on 46 studies and 144 estimates indicated longer mean RTs in DLD groups (g = .47, p < .001, 95% CI [.38, .55]). Moderator analyses indicated larger effects when tasks required verbal as opposed to nonverbal responses. No other moderators approached significance. All subgroup analyses were significant, indicating longer mean RTs in DLD groups across tasks, stimulus types, stimulus modalities, and response modalities. Individuals with DLD exhibit longer RTs across verbal and nonverbal tasks, which may contribute to observed difficulties in language, motor skills, and executive functioning. Simple processing speed measures should be included in screening for language delays but may not be suitable for differential diagnosis, given that slower processing may occur across multiple disorders. https://doi.org/10.23641/asha.21809355.

Vietnamese children with and without DLD: Classifier use and grammaticality over time

IntroductionOne way to identify Developmental Language Disorder (DLD) is to establish clinical markers in a language to serve as reliable indicators of the disorder. This study embarks on the search for clinical markers for Vietnamese using longitudinal data from children with and without DLD. MethodsWe matched ten children previously classified with DLD to ten with typical development (TD) by age and gender. Participants completed a story generation task at three time points: kindergarten, first, and second grade. Overall grammatical development was measured using mean length of utterance, MLU, and proportion of grammatical utterances, PGU. We examined a language-specific feature, classifiers, in terms of accuracy (omission errors), diversity (number of different classifiers), and productivity, or the use of classifiers in constructions of two-to-three elements (classifier+noun, numeral+classifier+noun). Longitudinal change and group differences were examined using linear mixed modeling, supplemented by linguistic analysis. ResultsBoth groups increased in MLU and PGU over time. The DLD group performed lower in kindergarten and continued to show lower performance over time on these measures. Classifier omission errors decreased over time with no group differences. Classifier diversity increased across groups, with lower performance by the DLD group in kindergarten and over time. For classifier productivity, TD children used classifiers in multiple constructions in kindergarten and maintained the same level over time. In contrast, children with DLD had minimal use of three-element constructions in kindergarten but increased in productivity over time. ConclusionsChildren with DLD produce shorter utterances with relatively more grammatical errors compared to their TD peers in the early school years. Though no longer committing classifier omission errors, children with DLD showed more restricted use of classifiers in terms of the number of different classifiers and constructions produced. Findings inform the search for Vietnamese clinical markers of DLD.

Phonological Priming in Children with Developmental Language Disorder

&lt;p&gt;本研究利用跨模式圖字干擾作業探討與比較習華語發展性語言障礙兒童(DLD)和典型發展兒童(TD)在音節、聲調與次音節單位（聲母及韻母）的音韻促發效應，以更深入了解兒童音韻表徵的型態及處理歷程。共有16名4至6歲11個月的DLD兒童和16名與其性別和年齡配對的TD兒童。促發項之音韻類型包括同音節、同聲母、同韻母、同聲調及無關項；促發項相對於目標項所呈現的時間為前150毫秒(SOA -150)、同時(SOA 0)及後150毫秒(SOA +150)。研究結果指出：(1)TD兒童的反應速度和正確率優於DLD兒童；(2)兩組兒童皆呈現同音節促進效應，且均無同聲調促進效應，代表華語兒童詞彙提取歷程中已具有音節框架的存在，而聲調對於詞彙提取的貢獻有限；(3)兩組主要的差異在次音節單位，DLD兒童在SOA -150和SOA +150時均呈現同韻母促進效應，而TD兒童僅在SOA 0呈現同聲母抑制效應。據此推論DLD兒童在次音節單位的處理方式與TD兒童不同，TD兒童可能是採用Cohort model的處理模式，而DLD兒童則未使用或尚未發展成熟到能使用此處理模式，其依賴語音知覺顯著性較高的韻母協助詞彙提取。整體而言，DLD兒童音韻處理歷程較無效率，顯現出詞彙提取困難。綜上推論，建議教學與臨床治療需重視DLD兒童詞彙提取與音韻處理能力之評估與訓練。&lt;/p&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt;&lt;p&gt;Phonological priming with cross-modal picture-word interference task was used to in-vestigate the phonological processing in children with and without developmental language disorder (DLD). Sixteen children with DLD aged 4 to 6 years and 11 months, and 16 gender- and age-matched children with typical development (TD) were recruited. The target words were paired with 6 types of phonological primes (identical, syllable-related, onset-related, rhyme-related, tone-related, unrelated), and primes were presented 150ms before (SOA -150), simultaneously (SOA 0), or 150ms after (SOA +150) the target. Results showed that (1) the TD group performed faster and more accurately than the DLD group; (2) both groups demonstrated syllable priming and lack tone priming at all SOAs, which suggests children selected a syllable frame in the lexical access process and the contribution of tone is limited; (3) the primary differences between these two groups were at sub-syllabic level. The DLD group exhibited rhyme priming at SOA -150 and SOA +150, while the TD group only ex-hibited onset interference at SOA 0. Based on these results, the possible inference was that children with TD may apply Cohort model to perceive incoming phonological information, however, children with DLD may not utilize this manner or they were not mature enough to use it, and their word retrieval process depended on high-saliency rhyme. Overall, the phonological processing in children with DLD was inefficient, and they revealed word re-trieval difficulty. Thus, it is recommended to evaluate and intervene word retrieval and phonological processing in children with DLD.&lt;/p&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt;

Narrative macrostructure and microstructure profiles of bilingual children with autism spectrum disorder: differentiation from bilingual children with developmental language disorder and typical development

AbstractChildren with autism spectrum disorder (ASD) show heterogeneous language profiles beyond early language delays. Understanding the second language profiles of bilingual children with ASD is important for clinical practice in diverse societies. Accordingly, we examined the narrative abilities of bilinguals with ASD, with developmental language disorder (DLD), and with typical development (TD) to determine which narrative components best differentiate bilinguals with ASD from the other groups. Participants were 29 bilingual children with ASD, DLD, and TD who were matched for age (mean = 6;8), nonverbal intelligence, and receptive vocabulary. Narratives were coded for macrostructure (story grammar (SG) scores, number of individual SG components) and microstructure (syntactic complexity, mean length of utterance, lexical diversity, and story length). The TD group had superior SG scores, included more SG components, and used longer utterances and more complex syntax than the ASD group, whereas no differences were found between the clinical groups. For SG components requiring perspective-taking abilities, the ASD group had worse performance than the TD and DLD groups. Our results suggest that bilingual children with ASD show weaknesses in both macrostructure and microstructure, which can overlap with children with DLD. The linguistic profiles of bilingual children with ASD and DLD are thus both overlapping and distinct.

Attentional modulation of interhemispheric (a)symmetry in children with developmental language disorder

The nature of auditory processing problems in children with developmental language disorder (DLD) is still poorly understood. Much research has been devoted to determining the extent to which DLD is associated with general auditory versus language-specific dysfunction. However, less emphasis has been given to the role of different task conditions in these dysfunctions. We explored whether children with DLD demonstrate atypical interhemispheric asymmetry during the auditory processing of speech and non-speech sounds and whether this interhemispheric balance is modulated by attention. Magnetoencephalography was used to record auditory evoked fields in 18 children (9 to 10 years old), 9 with DLD and 9 with language typical development, during active or passive listening to speech and non-speech sounds. A linear mixed model analysis revealed a bilateral effect of attention in both groups. Participants with DLD demonstrated atypical interhemispheric asymmetry, specifically in the later (185–600 ms) time window but only during the passive listening condition. During the active task, the DLD group did not differ from the typically developed children in terms of hemispheric balance of activation. Our results support the idea of an altered interhemispheric balance in passive auditory response properties in DLD. We further suggest that an active task condition, or top–down attention, can help to regain leftward lateralization, particularly in a later stage of activation. Our study highlights the highly dynamic and interhemispheric nature of auditory processing, which may contribute to the variability in reports of auditory language processing deficits in DLD.

Decontextualized Language Skills in Children with Developmental Language Disorder and Developmental Dyslexia: Evidence from a Word Definition Task

The present study investigates the development of decontextualized language skills, by means of a word definition task, in children with Developmental Language Disorder (DLD) &amp; Developmental Dyslexia (DD). Although these disorders have a common basis and have studied for different aspects of language abilities, no studies, to date, have compared them in terms of their word definitional skills. Addressing this gap, the present study examined thirty-six children with DLD, or DD or typically developing (TD) age-matched children. All participants were tested on their expressive vocabulary, non-verbal abilities and on their definitional skills. In the definitional task they had to define 16 words (8 nouns, 4 verbs, and 4 adjectives; simple vs. compound, abstract vs. concrete) orally. Definitions were evaluated on both content and form. Results have shown that more decontextualized language was used by the TD group than by the two impaired groups and the DD group exhibited the use of more decontextualized language than the DLD group. By contrast, no differences were found among the groups in form. Delving into different word characteristics more demanding were found to be abstract and compound words. DLD group faced more difficulties than the other groups in compound abstract nouns. Fewer differences were found in verbs suggesting that formal definitions of verbs are equally demanding for all groups. Findings suggest that these two disorders have more similarities in most of the categories in terms of the use of decontextualized language. The present study offers new knowledge on the development of definitional skills and indicates that research should investigate them in the light of interrelation of different word characteristics; otherwise the picture we get can be misleading.

Investigating Narrative Performance in Children With Developmental Language Disorder: A Systematic Review and Meta-Analysis.

Narrative assessment is one potentially underutilized and inconsistent method speech-language pathologists may use when considering a diagnosis of developmental language disorder (DLD). However, narration research encompasses many varied methodologies. This systematic review and meta-analysis aimed to (a) investigate how various narrative assessment types (e.g., macrostructure, microstructure, and internal state language) differentiate children with typical development (TD) from children with DLD, (b) identify specific narrative assessment measures that result in greater group differences, and (c) evaluate participant and sample characteristics that may influence performance differences. Electronic databases (PsycINFO, ERIC, and PubMed) and ASHAWire were searched on July 30, 2019, to locate studies that reported oral narrative language measures for both DLD and TD groups between ages 4 and 12 years; studies focusing on written narration or other developmental disorders only were excluded. We extracted data related to sample participants, narrative task(s) and assessment measures, and research design. Group differences were quantified using standardized mean differences. Analyses used mixed-effects meta-regression with robust variance estimation to account for effect size dependencies. Searches identified 37 eligible studies published between 1987 and 2019, including 382 effect sizes. Overall meta-analysis showed that children with DLD had decreased narrative performance relative to TD peers, with an overall average effect of -0.82 SD, 95% confidence interval [-0.99, -0.66]. Effect sizes showed significant heterogeneity both between and within studies, even after accounting for effect size-, sample-, and study-level predictors. Across model specifications, grammatical accuracy (microstructure) and story grammar (macrostructure) yielded the most consistent evidence of TD-DLD group differences. Present findings suggest some narrative assessment measures yield significantly different performance between children with and without DLD. However, researchers need to improve consistency of inclusionary criteria, descriptions of sample characteristics, and reporting of correlations between measures to determine which assessment measures reliably distinguish between groups. https://doi.org/10.23641/asha.21200380.

Children neuropsychological and behavioral scale-revision 2016 in the early detection of autism spectrum disorder.

BackgroundThe Children Neuropsychological and Behavioral Scale-Revision 2016 (CNBS-R2016) is a widely used developmental assessment tool for children aged 0–6 years in China. The communication warning behavior subscale of CNBS-R2016 is used to assess the symptoms of autism spectrum disorder (ASD), and its value of >30 points indicates ASD based on CNBS-R2016. However, we observed that children with relatively lower values were also diagnosed with ASD later on in clinical practice. Thus, this study aimed to identify the suitable cutoff value for ASD screening recommended by the communication warning behavior of CNBS-R2016.Materials and methodsA total of 90 typically developing (TD) children and 316 children with developmental disorders such as ASD, developmental language disorder (DLD), and global developmental delay (GDD; 130 in the ASD group, 100 in the DLD group, and 86 in the GDD group) were enrolled in this study. All subjects were evaluated based on the CNBS-R2016. The newly recommended cutoff value of communication warning behavior for screening ASD was analyzed with receiver operating curves.ResultsChildren in the ASD group presented with lower developmental levels than TD, DLD, and GDD groups in overall developmental quotient assessed by CNBS-R2016. We compared the consistency between the scores of communication warning behavior subscale and Autism Behavior Checklist (ABC), Childhood Autism Rating Scale (CARS), Autism Diagnostic Observation Schedule, second edition (ADOS-2), and clinical diagnosis for the classification of ASD at a value of 30 based on the previously and newly recommended cutoff value of 12 by the CNBS-R2016. The Kappa values between the communication warning behavior and ABC, CARS, ADOS-2, and clinical diagnosis were 0.494, 0.476, 0.137, and 0.529, respectively, with an agreement rate of 76.90%, 76.26%, 52.03%, and 82.27%, respectively, when the cutoff point was 30. The corresponding Kappa values were 0.891, 0.816, 0.613, and 0.844, respectively, and the corresponding agreement rate was 94.62%, 90.82%, 90.54%, and 93.10%, respectively, when the cutoff point was 12.ConclusionThe communication warning behavior subscale of CNBS-R2016 is important for screening ASD. When the communication warning behavior score is 12 points or greater, considerable attention and further comprehensive diagnostic evaluation for ASD are required to achieve the early detection and diagnosis of ASD in children.

Predictors of school concern across the transition to secondary school with developmental language disorder and low language ability: A longitudinal developmental cascade analysis.

Developmental language disorder (DLD) has clear functional ramifications in the areas of social competency, emotion recognition, emotional well-being and literacy skill, which have been found to persist from childhood to adolescence. These domains are important factors during the transition from primary to secondary school in typical development (TD). Nevertheless, there is a paucity of research on the transition from primary to secondary school for adolescents with DLD and low language (LL) ability. To investigate the association between psychosocial domains, literacy skill and concerns about school during the transition to secondary school for adolescents with DLD, LL and their TD peers. The first research question examined whether levels of social competency, emotion recognition, emotional well-being and literacy skill predicted school concern for the three groups. The second research question explored the longitudinal relationship between school concern and psychosocial and literacy indicators over the transition. Participants (aged 10-11 years) with DLD (n = 30), LL ((n = 29) and TD (n = 42) were recruited for this longitudinal study from eight UK primary schools. Standardized language and psychosocial assessments were administered in the spring and summer terms of the final year of primary school, and the autumn and summer terms of the first year in secondary school. Regression analyses showed pre-transition school concern to be predicted by emotion recognition for the DLD group, by social competence and emotional well-being for the LL group, and by social competence for the TD group. Post-transition concern was predicted by emotional well-being for the LL group; with no significant predictors for the DLD/TD groups. Path analyses revealed an association between literacy skill and emotion recognition for the DLD group. A developmental cascade illustrated a relationship between social competence and emotional well-being for the TD group. This study concludes that transition interventions must be differentiated according to language ability; support for DLD adolescents should focus on emotion recognition skill, provision for LL adolescents should centre on emotional well-being, and TD participants should be particularly supported in the domain of social competence in advance of the move to secondary school. Additionally, this study emphasizes the importance of the inclusion of a LL group, as their outcomes cannot be predicted using DLD/TD research. What is already known on the subject There is limited research exploring the transition from primary school to secondary for adolescents with DLD or LL ability. Research on TD has highlighted vulnerable domains at this time. As these key areas are evidenced spheres of difficulty in DLD and LL, there was a strong impetus for this study. What this paper adds to existing knowledge This study reveals differences between language ability groups in the predictors of school concern both pre- and post-transition. Concerns of adolescents with DLD were predicted by emotion recognition, those of adolescents with LL were predicted by emotional well-being, and a longitudinal link between social competence and emotional well-being was evidenced for TD adolescents. What are the potential or actual clinical implications of this work? This study has implications for researchers and clinicians, as a need has been identified for a new clinical group. It also has practical implications for transition support planning for educational practitioners, families and adolescents.

Use of Aspect Markers by Mandarin-speaking Children with High-Functioning Autism Plus Language Impairment and Children with Developmental Language Disorder

IntroductionThis study investigates the comprehension and production of four typical Mandarin aspect markers zai-, -le, -zhe, and -guo by preschool children with high functioning autism plus language impairment (HFA-LI) and those with developmental language disorder (DLD), by comparing them with typically developing age-matched (TDA) children. MethodsTwenty children with HFA-LI (M/F: 18/2; mean age: 5.20), 20 with DLD (M/F: 11/9; mean age: 5.25), and 20 TDA children (M/F:14/6; mean age:5.27) completed a picture-choice task and priming picture-description task. The results were analyzed using non-parametric methods. ResultsIn the comprehension task, the HFA-LI and DLD groups achieved lower accuracy than the TDA group on zai-, -le, and -guo. The comprehension of aspect markers in the HFA-LI and DLD groups was affected by lexical aspect. In the production task, the HFA-LI and DLD groups produced fewer sentences with the target aspect marker for all four aspect markers than the TDA group. However, they produced more sentences with bare verb forms for zai- and -guo than the TDA group. Furthermore, all three groups tended to combine aspect markers with their semantically inherent types of verbs (e.g, zai-+Activity verbs). The HFA-LI group produced more sentences irrelevant to the task than the other two groups for -zhe and -guo, and some children in the HFA-LI group produced ungrammatical sentences in which both the progressive zai- and perfective -le were used. ConclusionsChildren with HFA-LI and DLD demonstrate similarities in the comprehension and production of Mandarin aspect markers, given their poor comprehension of the aspect markers zai-, -le and -guo, and poor production of all four aspect markers compared to their TDA peers. Their performance was also impacted by lexical aspect.

Are items actively removed from working memory during free time in children with developmental language disorder?

Children with developmental language disorder (DLD) have deficits in verbal and non-verbal processing relative to typically developing (TD) peers, potentially reflecting difficulties in working memory, processing speed and inhibition of interference. We examined working memory in children with DLD using the serial-order-in-a-box-complex span (SOB-CS) interference-based model, which posits a time-based mechanism, free time, that governs how interference affects processing performance. (1) To determine the degree to which children with DLD and TD children differ in the amount of free time available during working memory tasks, and whether potential group differences in free time differ depending on the domain of task demands? (2) To determine the relationship between free time and interference effects on working memory accuracy in children with DLD relative to TD peers. We examined the relationship between free time and working memory in children aged 9-13 years with DLD relative to age-matched TD peers. Working memory tasks involved five conditions that varied verbal versus non-verbal task demands in an interference processing phase relative to a recall test phase. Free time was the time between response on the interference processing task and onset of the recall test phase. DLD and TD groups did not differ in total free time in any condition. Results indicated group differences in the relationship between free time and accuracy in the conditions involving verbal recall, but not non-verbal recall. In the verbal-only condition, relatively more free time was associated with worse accuracy for the DLD group, but with better accuracy for the TD group. In the condition with verbal recall paired with non-verbal interference processing, relatively more free time was associated with better accuracy for the DLD group, but not for the TD group. The overall findings suggest that free time between cognitive operations is positively associated with working memory for both verbal and non-verbal recall, except in the presence of high verbal interference for the DLD group (i.e., verbal interference paired with verbal recall). This finding may reflect poor encoding and attention under particularly challenging verbal processing demands for the DLD group. This study also demonstrates the importance of considering the interrelationships between processing speed and interference in working memory performance. What is already known on the subject DLD is characterized by core deficits in verbal processing, but also deficits in non-verbal processing. Processing-based hypotheses of DLD-limited verbal working memory, slowed processing speed and inefficient inhibition-do not fully account for behavioural profiles in DLD when considered separately, yet there is evidence suggesting interrelationships among these factors. What this paper adds to existing knowledge The current study tests the key mechanism posited by a theoretical framework that has the potential to integrate these processing-based hypotheses. Our findings indicate that the effect of this mechanism differed in DLD relative to TD peers in the presence of high verbal task demands. Our findings also demonstrate the importance of considering the interrelationships among cognitive processes in children with DLD. What are the potential or actual clinical implications of this work? In practice, results from the current study suggest that children with DLD may benefit from supplementing verbal information with non-verbal information and from pauses between successive presentations of verbal information. These strategies may support their ability to maintain and act on information during verbal processing.

Influences of bilingualism and developmental language disorder on how children learn and process words.

Previous studies found that bilingual children and adults with typical language development (TLD) perform better than monolinguals in novel word learning, but show lower scores on lexical retrieval tasks (e.g., naming known words). Children with developmental language disorder (DLD) lack in their abilities in both tasks compared with children with TLD. The current study tested the interplay between bilingualism and language disorder during novel word learning and lexical retrieval. Preschoolers (N = 101; 50 boys and 51 girls; mothers' mean years of education = 16.35) in four groups (Hebrew monolinguals or Russian-Hebrew bilinguals with DLD or TLD) learned 12 novel real words (6 with a familiar referent and 6 with a novel referent) and performed a lexical retrieval task. Children exhibited significant learning with no effect of bilingualism, but a negative effect of language disorder. Thus, children with DLD performed worse than children with TLD, and this ability was not affected by bilingualism. In lexical retrieval, DLD groups scored lower than TLD groups, and critically also bilinguals scored lower than monolinguals. This differential effect of bilingualism in the two tasks suggests that bilingualism does not impede language learning mechanisms even among children with DLD. Instead, the findings suggest that lower performance in the lexical retrieval task is due to decreased frequency of exposure. By exploring both word learning and lexical retrieval, the study highlights the differential mechanisms at play in the effects of bilingualism and language disorder on the developing lexicon. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

The Reliability of Short Conversational Language Sample Measures in Children With and Without Developmental Language Disorder.

Language sample analysis (LSA) represents an ecologically valid method for diagnosing, identifying goals, and measuring progress in children with developmental language disorder (DLD). LSA is, however, time consuming. The purpose of this study was to determine the length of sample needed to obtain reliable LSA measures for children in kindergarten and first grade with typical language (TL) and DLD using automated analyses from the Systematic Analysis of Language Transcripts software. Play-based conversational language samples collected on kindergarten to first-grade children with TL (n = 21) and DLD (n = 21) from a community-based sample were analyzed. Eight LSA measures were calculated from 1-, 3-, 5-, 7-, and 10-min sample cuts and compared to 20-min samples for reliability. Reliability estimates were similar for the TL and DLD groups except for errors and omissions, which showed overall higher levels of reliability in the DLD group and reached acceptable levels at 3 min. Percent grammatical utterances were reliable at 7 min in the DLD group and not reliable in shorter samples in the TL group. The subordination index was reliable at 10 min for both groups. Number of different words reached acceptable reliability at the 3-min length for the DLD group and at the 10-min length for the TL group. Utterances and words per minute were reliable at 3 min and mean length of utterance at 7 min in both groups. Speech-language pathologists can obtain reliable LSA measures from shorter, 7-min conversational language samples from kindergarten to first-grade children with DLD. Shorter language samples may encourage increased use of LSA. https://doi.org/10.23641/asha.19529287.

Working Memory Performance in Children With Developmental Language Disorder: The Role of Domain.

This study examined working memory in children with developmental language disorder (DLD). The overarching goal of this work was to integrate three primary processing-based hypotheses of DLD, (a) limited verbal working memory, (b) slowed processing speed, and (c) inefficient inhibition of interference, by using the serial-order-in-a-box-complex span (SOB-CS) computational model as our theoretical framework. We also examined the role of domain in working memory performance by varying the domain of interference and recall (i.e., verbal vs. nonverbal) task demands. Participants were 55 school-age children, 21 children with DLD and 34 age-matched typically developing (TD) peers (9-13 years old). Findings indicated that verbal and nonverbal working memory performance was poorer in the DLD than TD group. There was a modest benefit of dispersing interference and recall task demands across domains relative to task demands being within one domain, yet verbal interference affected performance to a greater degree than nonverbal interference in the DLD group. Overall findings supported a role for each of the processing-based hypotheses of DLD, albeit an incomplete role. In contrast, the SOB-CS model accounted for interrelationships among these processing-based factors and provided an explanation across patterns of findings. Thus, the SOB-CS model represents a useful step forward in explaining processing in children with DLD. https://doi.org/10.23641/asha.19526179.

Sentence Repetition as a Clinical Marker for Mandarin-Speaking Preschoolers With Developmental Language Disorder.

Sentence repetition (SR) is believed to be a clinical marker for developmental language disorder (DLD) across many languages. This study explored the potential of a self-designed Mandarin SR task (MSRT) to reflect Mandarin-speaking preschoolers' language ability and to differentiate children with and without DLD in this population. Furthermore, we aimed to compare five scoring systems for evaluating children's MSRT performance. In Study 1, the MSRT was administered to 59 typically developing (TD) children aged 3;6 (years;months) to 6;5 in China. The task was examined regarding its ability to correlate with language indices derived from children's narrative samples. In Study 2, both a TD and a DLD group were recruited to investigate the task's sensitivity, specificity, and likelihood ratios to distinguish between children with and without DLD. Study 1 showed that, using four of the five scoring methods, TD children's performance on the MSRT significantly correlated with all the language measures derived from narratives. Study 2 showed that the MSRT was able to differentiate children with and without DLD. The MSRT is a promising tool to reflect language abilities and identify DLD in Mandarin-speaking preschoolers. Based on the current evidence, we recommend that researchers and clinicians select the number of errors in the syllable method or the binary method when scoring responses to meet their specific needs. https://doi.org/10.23641/asha.19386257.