Speech disruptions in the narratives of English-speaking children with specific language impairment

The use of mazes over time in Spanish heritage speakers in the US

Introduction

Mazes are linguistic disfluencies such as filled pauses, repetitions, or revisions of grammatical, phonological, or lexical aspects of words that do not contribute to the meaning of a sentence. Bilingual children are believed to increase the numbers of mazes in their native or heritage language, the minority language, as they become more proficient in the second language, the societal language. Mazes may increase over time in bilingual Spanish-speaking children as they become more proficient in English, the societal language in the United States. However, current studies have not been conducted longitudinally. Higher rates of mazes in the heritage language over time may be due to changes in language proficiency and differences in processing demands in the children as they use more complex language. Moreover, children with developmental language disorder (DLD) can also present higher rates of mazes than children with typical language. Heritage speakers, therefore, are at risk of being misdiagnosed with DLD due to high rates of mazes. Currently, we do not understand what the typical rates of mazes are as heritage speakers get older and become more proficient in the societal language. The current study examined the type and frequency of Spanish mazes longitudinally in a group of 22 Spanish heritage speakers with and without DLD and determined the changes over time.

Methods

A total of 11 children with typical language development (TLD) and 11 with DLD participated in this 5-year longitudinal study. Using a wordless picture book, children completed a retelling task in Spanish during the spring of each academic year (PK to 3rd grade) as part of a 5-h testing battery. Narratives were transcribed and coded for types of mazes (filled pauses, repetitions, grammatical revisions, phonological revisions, and lexical revisions).

Results and conclusion

The results of the study indicate that TLD children increased their overall percentage of mazed words and utterances. The opposite pattern was observed in the DLD group, which decreased their percentage of mazed words and utterances. In contrast, both groups demonstrated a decrease in repetitions in first grade and an increase in third grade. Additionally, the TLD and DLD children decreased in the percentage of fillers in first grade and then increased in the third grade. Results suggest that maze use is quite variable in heritage speakers and does not necessarily differentiate groups. Clinicians should not rely solely on mazes to determine ability status. In fact, high use of mazes can reflect typical language development.

Disentangling the Grammar of 3- to 6-Year-Old Dutch Children With a Developmental Language Disorder

PURPOSE

Children with a developmental language disorder (DLD) are often delayed in their grammatical development. This is suggested to be the most important characteristic and clinical marker of DLD. However, it is unknown if this assumption is valid for young children, in the earliest stages of grammatical development. For this reason, this study investigates the complexity, diversity, and accuracy of the grammatical repertoires of 3- to 6-year-old Dutch children with DLD, in comparison to that of typically developing (TD) children matched on grammatical level.

METHOD

Language samples of 59 children (29 children with DLD and 30 TD children) were analyzed using multiple measures of grammatical complexity, diversity, and accuracy. The TD children and children with DLD were language-matched on their grammatical development using the levels of the Dutch version of the Language Assessment, Remediation, and Screening Procedure, the Taal Analyse Remediëring en Screening Procedure (TARSP; Schlichting, 2017). Thus, the children with DLD were significantly older than the TD children (respectively DLD age range: 2;7-5;4 [years;months], M _age = 4;1; and TD age range: 2;0-3;9, M _age = 2;9).

RESULTS

The results show that children with DLD are comparable to language-matched TD children in their grammatical accuracy and diversity, but that they produce less complex utterances.

CONCLUSIONS

The results indicate that children with DLD lag behind in their grammatical complexity as compared to language-matched TD children. The results also suggest that grammatical TARSP level is not sufficiently informative for selecting treatment goals. Instead, the results underline the importance of conducting language sample analyses, with special reference to the complexity of the utterances of a child with DLD.

A Systematic Review and Meta-analysis of Narrative Language Abilities in Children with Attention-Deficit/Hyperactivity Disorder

While children with ADHD are reported to have language problems, it is less clear if their ability to use language to tell a story (i.e., form a narrative) is impaired. Therefore, a systematic review and meta-analysis of studies examining the oral production of fictional stories in children with ADHD was conducted. Databases were systematically searched in January 2019 and December 2020 (follow-up). Studies comparing children (≤ 18 years) with ADHD to a control group of typically developing children were included. The meta-analysis adhered to PRISMA guidelines and was preregistered with PROSPERO [CRD42019122040]. Sixteen studies were retained. Results indicated that compared to typically developing children, children with ADHD produced less coherent narratives (Hedges' g = 0.58 p < .001), gave more ambiguous references (Hedges' g = 0.52, p < .001), made more disruptive errors (Hedges' g = 0.41, p < .001), and produced language that was less syntactically complex (Hedges' g = 0.39, p < .05). Children with ADHD also produced less language overall (Hedges' g = 0.27, p < .05), although this result appeared to be an artefact of publication bias. Two studies investigated internal state language and both found children with ADHD to produce narratives with less internal state language. Children with ADHD did not produce less fluent narratives (Hedges' g = 0.23, p = .47), although a scarcity of studies [K = 4] preclude firm conclusions. In conclusion, children with ADHD were impaired in several areas of oral narrative production and screening for narrative language problems should be considered when assessing language and communicative abilities in children with ADHD.

Using Free Computer-Assisted Language Sample Analysis to Evaluate and Set Treatment Goals for Children Who Speak African American English

Purpose Spoken language sample analysis (LSA) is widely considered to be a critical component of assessment for child language disorders. It is our best window into a preschool child's everyday expressive communicative skills. However, historically, the process can be cumbersome, and reference values against which LSA findings can be "benchmarked" are based on surprisingly little data. Moreover, current LSA protocols potentially disadvantage speakers of nonmainstream English varieties, such as African American English (AAE), blurring the line between language difference and disorder. Method We provide a tutorial on the use of free software (Computerized Language Analysis [CLAN]) enabled by the ongoing National Institute on Deafness and Other Communication Disorders-funded "Child Language Assessment Project." CLAN harnesses the advanced computational power of the Child Language Data Exchange System archive (www.childes.talkbank.org), with an aim to develop and test fine-grained and potentially language variety-sensitive benchmarks for a range of LSA measures. Using retrospective analysis of data from AAE-speaking children, we demonstrate how CLAN LSA can facilitate dialect-fair assessment and therapy goal setting. Results Using data originally collected to norm the Diagnostic Evaluation of Language Variation, we suggest that Developmental Sentence Scoring does not appear to bias against children who speak AAE but does identify children who have language impairment (LI). Other LSA measure scores were depressed in the group of AAE-speaking children with LI but did not consistently differentiate individual children as LI. Furthermore, CLAN software permits rapid, in-depth analysis using Developmental Sentence Scoring and the Index of Productive Syntax that can identify potential intervention targets for children with developmental language disorder.

Narrative Production in Mandarin-Speaking Children: Effects of Language Ability and Elicitation Method

Purpose We compared the narrative production in Mandarin-speaking children at risk (AR) for developmental language disorder (DLD) and typically developing (TD) controls to address two goals: (a) further our understanding of the Mandarin DLD phenotype and (b) examine the role of elicitation method in differentiating AR from TD. Method Twenty-one AR children and 21 age- and nonverbal IQ-matched peers produced two stories from the Multilingual Assessment Instrument of Narrative, first following an adult model (i.e., story-retell) and then without a model (i.e., story-tell). Group and task effects were analyzed on macrostructure and microstructure measures. Results For general macrostructure score and sentence complexity, children in the AR group performed more poorly than TD children on the more challenging story-tell task and showed decreased scores from retell to tell tasks. In addition, children in the AR group showed poorer performance on number of different words. Productivity and grammaticality measures did not show group differences. Discussion Consistent with previous findings, grammaticality and productivity were relatively preserved but story macrostructure, lexical diversity, and sentence complexity were vulnerable in Mandarin-speaking children with or AR for DLD. Having an adult model benefited both groups in sentence complexity and story macrostructure and potentially helped maintain the performance in TD children as they engaged in the more challenging story-telling task.

Linguistic Maze Production by Children and Adolescents With Attention-Deficit/Hyperactivity Disorder

Purpose Previous investigations reveal that children with attention-deficit/hyperactivity disorder (ADHD) produce elevated rates of linguistic mazes (i.e., filled pauses, repetitions, revisions, and/or abandoned utterances) in expressive language samples (Redmond, 2004). The current study aimed to better understand maze use of children and adolescents with ADHD with a focus on the specific maze types produced in different language sampling contexts based on the Autism Diagnostic Observation Schedule (ADOS-2; Lord et al., 2012). Method Participants included twenty-five 4- to 13-year-olds with a confirmed diagnosis of ADHD. Each participant completed the ADOS to provide narrative and conversational language samples. Research assistants transcribed at least 100 utterances from the ADOS using Systematic Analysis of Language Transcripts (Miller & Chapman, 2000) conventions. Dependent variables included the rates of repetitions, revisions, filled pauses, content mazes (Thordardottir & Ellis Weismer, 2002), and stalls (Rispoli, 2003; Rispoli, Hadley, & Holt, 2008) produced in narrative and conversational portions of the ADOS. Results In the full sample, participants produced a significantly greater rate of revisions than filled pauses (p = .01) and repetitions (p < .01). Participants also produced a significantly lower rate of filled pauses than content mazes (p < .01). Across contexts, participants produced a higher rate of filled pauses in conversational versus narrative contexts. Age was positively correlated with revisions and content mazes. Mean length of utterance was positively correlated with revisions, repetitions, and context mazes. Expressive language ability was positively correlated with filled pauses and stalls. Conclusion The children and adolescents in our sample demonstrated a unique profile of maze use. Sampling context had a limited influence on maze use, whereas maze use was impacted by age, mean length of utterance, and expressive language ability. Study findings highlight the importance of analyzing maze types separately rather than as a single category.

Frequency of mazes in an experimental narrative task in monolingual English and Spanish-English bilingual children

Mazes such as self-corrections during speech production are observed in all speakers at varying rates. One hypothesis is that mazes result from the challenge of speech planning when speakers experience linguistic uncertainty. The aim of the study was to examine mazes in 4- and 5-year old typically developing English monolingual and Spanish-English bilingual children's narratives when uncertainty was manipulated in narrative context. Three typically developing groups participated in this study: a Spanish-English bilingual group, an age-matched monolingual English-speaking group and a language-matched younger monolingual English-speaking group. Two narrative task conditions were designed to manipulate linguistic uncertainty as a means of experimentally testing for the production of mazes. In the more uncertainty condition, the picture scenes presented did not depict a story with a logical sequence or ending and a less uncertainty condition where the picture scenes depicted a story scene with a logical sequence and ending. Maze frequency in two narrative conditions and the amount of mazes between groups were compared to explore conditions and related factors to frequency of mazes in young monolingual English and Spanish-English bilingual children. Number of different words was correlated with a higher mazes frequency for all three groups across both narrative conditions. Manipulation of certainty in narrative conditions elicited mazes in monolingual and bilingual children. Bilingual children did not exhibit more mazes than their monolingual peers indicating that bilingual experience in and of itself was not an indicator of exhibiting more mazes during this type of task.

A Narrative Evaluation of Mandarin-Speaking Children With Language Impairment

PURPOSE

We aimed to study narrative skills in Mandarin-speaking children with language impairment (LI) to compare with children with LI speaking Indo-European languages.

METHOD

Eighteen Mandarin-speaking children with LI (mean age 6;2 [years;months]) and 18 typically developing (TD) age controls told 3 stories elicited using the Mandarin Expressive Narrative Test (de Villiers & Liu, 2014). We compared macrostructure-evaluating descriptions of characters, settings, initiating events, internal responses,plans, actions, and consequences. We also studied general microstructure, including productivity, lexical diversity, syntactic complexity, and grammaticality. In addition, we compared the use of 6 fine-grained microstructure elements that evaluate particular Mandarin linguistic features.

RESULTS

Children with LI exhibited weaknesses in 5 macrostructure elements, lexical diversity, syntactic complexity, and 3 Mandarin-specific, fine-grained microstructure elements. Children with LI and TD controls demonstrated comparable performance on 2 macrostructure elements, productivity, grammaticality, and the remaining 3 fine-grained microstructure features.

CONCLUSIONS

Similarities and differences are noted in narrative profiles of children with LI who speak Mandarin versus those who speak Indo-European languages. The results are consistent with the view that profiles of linguistic deficits are shaped by the ambient language. Clinical implications are discussed.

Quantitative analysis of disfluency in children with autism spectrum disorder or language impairment

Deficits in social communication, particularly pragmatic language, are characteristic of individuals with autism spectrum disorder (ASD). Speech disfluencies may serve pragmatic functions such as cueing speaking problems. Previous studies have found that speakers with ASD differ from typically developing (TD) speakers in the types and patterns of disfluencies they produce, but fail to provide sufficiently detailed characterizations of the methods used to categorize and quantify disfluency, making cross-study comparison difficult. In this study we propose a simple schema for classifying major disfluency types, and use this schema in an exploratory analysis of differences in disfluency rates and patterns among children with ASD compared to TD and language impaired (SLI) groups. 115 children ages 4–8 participated in the study (ASD = 51; SLI = 20; TD = 44), completing a battery of experimental tasks and assessments. Measures of morphological and syntactic complexity, as well as word and disfluency counts, were derived from transcripts of the Autism Diagnostic Observation Schedule (ADOS). High inter-annotator agreement was obtained with the use of the proposed schema. Analyses showed ASD children produced a higher ratio of content to filler disfluencies than TD children. Relative frequencies of repetitions, revisions, and false starts did not differ significantly between groups. TD children also produced more cued disfluencies than ASD children.

Reading skills in young adolescents with a history of Specific Language Impairment: The role of early semantic capacity

This study assessed the reading skills of 19 Spanish-Catalan children with Specific Language Impairment (SLI) and 16 age-matched control children. Children with SLI have difficulties with oral language comprehension, which may affect later reading acquisition. We conducted a longitudinal study examining reading acquisition in these children between 8 and 12 years old and we relate this data with early oral language acquisition at 6 years old. Compared to the control group, the SLI group presented impaired decoding and comprehension skills at age 8, as evidenced by poor scores in all the assessed tasks. Nevertheless, only text comprehension abilities appeared to be impaired at age 12. Individual analyses confirmed the presence of comprehension deficits in most of the SLI children. Furthermore, early semantic verbal fluency at age 6 appeared to significantly predict the reading comprehension capacity of SLI participants at age 12. Our results emphasize the importance of semantic capacity at early stages of oral language development over the consolidation of reading acquisition at later stages.

LEARNING OUTCOMES

Readers will recognize the relevance of prior oral language impairment, especially semantic capacity, in children with a history of SLI as a risk factor for the development of later reading difficulties.

Phonological complexity in school-aged children who stutter and exhibit a language disorder

PURPOSE

The Index of Phonological Complexity and the Word Complexity Measure are two measures of the phonological complexity of a word. Other phonological measures such as phonological neighborhood density have been used to compare stuttered versus fluent words. It appears that in preschoolers who stutter, the length and complexity of the utterance is more influential than the phonetic features of the stuttered word. The present hypothesis was that in school-age children who stutter, stuttered words would be more phonologically complex than fluent words, when the length and complexity of the utterance containing them is comparable. School-age speakers who stutter were hypothesized to differ from those with a concomitant language disorder.

METHODS

Sixteen speakers, six females and ten males (M age=12;3; Range=7;7 to 19;5) available from an online database, were divided into eight who had a concomitant language disorder (S+LD) and eight age- and sex-matched speakers who did not (S-Only).

RESULTS

When all stuttered content words were identified, S+LD speakers produced more repetitions, and S-Only speakers produced more inaudible sound prolongations. When stuttered content words were matched to fluent content words and when talker groups were combined, stuttered words were significantly (p≤0.01) higher in both the Index of Phonological Complexity and the Word Complexity Measure and lower in density ("sparser") than fluent words.

CONCLUSIONS

Results corroborate those of previous researchers. Future research directions are suggested, such as cross-sectional designs to evaluate developmental patterns of phonological complexity and stuttering plus language disordered connections.

EDUCATIONAL OBJECTIVES

The reader will be able to: (a) Define and describe phonological complexity; (b) Define phonological neighborhood density and summarize the literature on the topic; (c) Describe the Index of Phonological Complexity (IPC) for a given word; (d) Describe the Word Complexity Measure (WCM) for a given word; (e) Summarize two findings from the current study and describe how each relates to studies of phonological complexity and fluency disorders.

School-age children with specific language impairment produce more speech disfluencies than their peers

PURPOSE

To compare the occurrence of speech disfluencies during narrative production in children with specific language impairment (SLI) and their age-matched peers.

METHODS

The study included 60 children aged between 7 and 10 years, 40 with typical language development and 20 with SLI. For data collection, a series of 15 stories was used, each one represented by pictures composed of four scenes. Narratives were transcripted and the speech disfluencies presented on them were classified as stuttering-like disfluencies (part-word repetition, single-syllable word repetition, and dysrhythmic phonation - prolongations, blocks and broken words) or other disfluencies (interjection, revision/abandoned utterances, and multisyllable/phrase repetition). The disfluency categories were compared in each group and its occurrence was also compared between groups.

RESULTS

The occurrence of stuttering-like and other disfluencies did not differ among children with typical language development, whereas children with SLI produced other disfluencies. Between-group comparison showed that children with SLI produced more disfluencies of both types than their age-matched peers.

CONCLUSION

Children with SLI showed more speech disfluencies during narrative production than their age-matched peers, and the most common disfluencies used by them were not typical of people who stutter (interjection, revision/abandoned utterances, and multisyllable/phrase repetition).

The use of sophisticated words with children with specific language impairment during shared book reading

In the context of the use of sophisticated (i.e., low-frequency) words with children with specific language impairment (SLI), the present study investigates the relationship between maternal interactive support for meaning and both conversational responsiveness and lexical development of children with SLI. Fifteen Italian-speaking children with SLI (age range: 3;4-5;6) and two groups of typically developing children--15 chronological age (CA)-matched (3;8-5;8) and 15 language age (LA)-matched (1;10-3;5)--were videotaped during shared book reading with their mothers. Maternal utterances which included or were related to a sophisticated word were coded on the basis of informativeness and scaffolding provided; child utterances were coded for complexity. In addition, child's lexical development was assessed three months later. Mothers of children with SLI produced a higher percentage of directly informative utterances with gestural scaffolding than did mothers of CA-matched children, and only in the SLI group this kind of utterances were significantly followed by child's extended utterances. Child's lexical development (production) was related to direct maternal informativeness in both the SLI- and CA-matched groups, and to gestural scaffolding only in the SLI group. On the whole, these findings suggest that mothers of children with SLI attune their language to their children's linguistic limitations and that the gestural quality of the interactive scaffolding is related to these children's conversational participation and their level of lexical progress.

LEARNING OUTCOMES

The reader will recognize the importance of maternal support for the meaning of low-frequency words in promoting the child's conversational responsiveness and lexical development, particularly with children with SLI. These children seem to benefit when provided with direct information accompanied by gestural scaffolding. These findings, if replicated with a larger group of participants, could help clinicians develop improved strategies for teaching parents.

The Rules of the Game: Properties of a Database of Expository Language Samples

Purpose

The authors created a database of expository oral language samples with the aims of describing the nature of students' expository discourse and providing benchmark data for typically developing preteen and teenage students.

Method

Using a favorite game or sport protocol, language samples were collected from 235 typically developing students in Grades 5, 6, 7, and 9. Twelve language measures were summarized from this database and analyses were completed to test for differences across ages and topics. To determine whether distinct dimensions of oral language could be captured with language measures from these expository samples, a factor analysis was completed.

Results

Modest differences were observed in language measures across ages and topics. The language measures were effectively classified into four distinct dimensions: syntactic complexity, expository content, discourse difficulties, and lexical diversity.

Conclusion

Analysis of expository data provides a functional and curriculum-based assessment that has the potential to allow clinicians to document multiple dimensions of children's expressive language skills. Further development and testing of the database will establish the feasibility of using it to compare individual students' expository discourse skills to those of their typically developing peers.

A duração da pausa silente difere entre palavras de classe aberta ou fechada?

Objetivo Verificar se o tempo médio das pausas silentes difere para a classe das palavras (aberta ou fechada) e se há diferença entre esse tempo para crianças em desenvolvimento típico de linguagem e crianças com distúrbio específico de linguagem (DEL), em cada tipo de palavra. Métodos Participaram da pesquisa 40 crianças em desenvolvimento típico de linguagem e 20 com DEL, com idade variando entre 7 e 10 anos. Cada sujeito elaborou 15 narrativas, baseadas em uma sequência de quatro cenas cada. Após a transcrição das amostras, as palavras foram classificadas como de classe aberta (substantivo, adjetivo, verbo, advérbio e numeral), ou fechada (artigo, preposição, pronome, conjunção e interjeição). Em um segundo momento, as amostras foram submetidas a um software para análise das pausas silentes, que permitiu o levantamento do tempo (milissegundos) das pausas imediatamente anteriores a cada uma dessas categorias gramaticais. Resultados Em ambos os grupos, a pausa silente foi mais longa quando precedia as palavras de classe fechada, sendo que o grupo com DEL, em geral, apresentou pausas silentes mais longas que seus pares. Conclusão A duração da pausa silente varia conforme a classe gramatical da palavra que será enunciada, sendo menor quando precede palavras de classe aberta. Além disso, o fato de os indivíduos com DEL apresentarem pausas silentes mais longas que seus pares, confirma a menor velocidade de seu processamento linguístico.

Word class and silent pauses in spoken narratives of children with specific language impairment

PURPOSE

To determine whether word class has any influence on the mean duration of silent pauses in the spoken narratives of children with specific language impairment (SLI) and in those with typical language development (TLD).

METHODS

The study sample consisted of 60 children in the age range from 7 to 10 years: 20 with SLI; and 40 with TLD. Each child produced 15 narratives, each based on a set of four pictures (scenes) and each set of pictures being more complex than the last. The narratives were analyzed, and nouns, adjectives, verbs, conjunctions, prepositions, and pronouns were identified. A computer program was used in order to determine the duration (in milliseconds) of the silent pauses preceding words of each class.

RESULTS

In both groups, silent pauses were shortest before nouns and longest before conjunctions. For all word classes, the mean duration of silent pauses was longer in the SLI group than in the TLD group.

CONCLUSION

Word class influences the duration of silent pauses, which are shorter before nouns and longer before conjunctions. Children with SLI produce longer silent pauses, possibly because of their language processing difficulties.

Story's complexity and silent pauses in children with and without specific language impairment

PURPOSE

To verify the average time of silent pauses in narratives and the influence of story's complexity in the occurrence of these pauses in narratives of children with typical language development and children with specific language impairment (SLI), and further to compare these aspects between groups.

METHODS

Sixty children aged between seven to ten years took part in this research, being 40 typical language developing children and 20 with SLI. To collect data, each child produced 15 narratives, each one based on a four-scene-sequence. These narratives show increasing complexity of the relations between the characters, since absence of intentionality (mechanical and behavioral sequences) to relations between characters with mental states attribution (intentional sequences), which allowed the survey of the average time of silent pauses in the narratives produced.

RESULTS

Story's complexity has influenced the average time of silent pauses in narratives of children with typical language development, however, for children with SLI this pattern was not observed. The comparison between groups indicates a significant difference in all types of narratives, with the highest average in the group with SLI.

CONCLUSION

Due to their linguistic impairment, children with SLI had longer silent pauses in their narratives. Story complexity influenced the average time of silent pauses in the narratives of children with typical language development, but this difference did not occur in the narratives of children with SLI.

Effects of Deep Brain Stimulation on Pausing During Spontaneous Speech in Parkinson's Disease

The present study examined pausing patterns in spontaneous speech as a measure of the effect of deep brain stimulation (DBS) of the subthalamic nucleus (STN) on parkinsonian speech. Pauses reflect various aspects of speech and language processes, including motor initiation and linguistic planning. Relatively little attention has been given to pauses in determining the effect of STN-DBS. An examination of pausing may be helpful to understanding how this form of therapy affects these behaviors. Seven individuals with Parkinson's disease who received surgery for bilateral STN-DBS participated. Spontaneous speech samples were elicited in both the ON and OFF STN-DBS condition. Findings indicated that long pauses (250-3000 ms) in spontaneous speech were significantly shorter and more frequent in the STN-DBS ON condition. Furthermore, the proportion of nonlinguistic boundary pauses was significantly greater with stimulation. The findings support previous studies suggesting that speech motor control and lexical retrieval may be affected by STN-DBS.

Fluency patterns in narratives from children with localization related epilepsy

This study assessed the relationship between fluency and language demand in children with epilepsy, a group known to demonstrate depressed language skills. Disfluency type and frequencies were analyzed in elicited narratives from 52 children. Half of these children had localization-related epilepsy (CWE), while the others were age- and gender-matched typically-developing (TD) peers. CWE were found to be significantly more disfluent overall than their matched TD peers during narrative productions, and demonstrated a higher proportion of stutter-like disfluencies, particularly prolongations. The current study adds to an emerging literature that has found depressed language skills and listener perceptions of verbal ability in children with chronic seizure activity, and contributes to the small but growing literature that suggests that disfluency during spoken language tasks may be a subtle marker of expressive language impairment.

EDUCATIONAL OBJECTIVES

The reader will be able to (a) describe why children with epilepsy might be at greater risk for language delays and or increased levels of disfluency; (b) describe profiles of fluency that differentiated children with chronic and recent-onset epilepsy from their age and gender matched peers; and (c) apply this information to monitoring of children with seizure disorder on their caseloads.

Analysis of speech fluency in Williams syndrome

Williams syndrome (WS) is a neurodevelopmental genetic disorder, often referred as being characterized by dissociation between verbal and non-verbal abilities, although the number of studies disputing this proposal is emerging. Indeed, although they have been traditionally reported as displaying increased speech fluency, this topic has not been fully addressed in research. In previous studies carried out with a small group of individuals with WS, we reported speech breakdowns during conversational and autobiographical narratives suggestive of language difficulties. In the current study, we characterized the speech fluency profile using an ecologically based measure--a narrative task (story generation) was collected from a group of individuals with WS (n = 30) and typically developing group (n = 39) matched in mental age. Oral narratives were elicited using a picture stimulus--the cookie theft picture from Boston Diagnosis Aphasia Test. All narratives were analyzed according to typology and frequency of fluency breakdowns (non-stuttered and stuttered disfluencies). Oral narratives in WS group differed from typically developing group, mainly due to a significant increase in the frequency of disfluencies, particularly in terms of hesitations, repetitions and pauses. This is the first evidence of disfluencies in WS using an ecologically based task (oral narrative task), suggesting that these speech disfluencies may represent a significant marker of language problems in WS.

Speech timing and pausing in children with specific language impairment

Articulation rate, speaking rate, as well as the duration and location of pauses, were analysed in 10 children with specific language impairment (SLI) and a comparison group of seven younger children producing utterances of similar lengths. Children with SLI were significantly slower in articulation rate, but not speaking rate or pausing time, indicating a group difference attributable to longer syllable duration. The correlation between the duration of the pause preceding a child's speaking turn and the length of the subsequent child utterance was calculated as an indication of children's use of the pause for planning the utterance. The correlation was not significant in either group, and not significantly different between groups. An analysis of the position of pauses within speaking turns showed more syllables following than preceding the pause, with no significant group differences. Theoretical implications are discussed.

Investigando os distúrbios de aquisição de linguagem a partir das queixas

OBJETIVO: Investigar as queixas comumente relatadas por pais de crianças com Distúrbio de Linguagem. Além disso, buscou-se analisar as condições de recepção e expressão verbais destas crianças. MÉTODOS: A amostra foi constituída por 55 crianças, na faixa etária entre 2 e 12 anos, de ambos os gêneros. As queixas relatadas pela família no inicio da intervenção terapêutica foram analisadas e subdivididas, considerando-se prejuízo de produção verbal, compreensão verbal e misto (compreensão e produção). Posteriormente, foram analisados os desempenhos das crianças em provas de compreensão verbal e produção nos níveis fonológico, semântico, gramatical e pragmático. RESULTADOS: Ao analisarmos o desempenho de crianças cujos familiares apresentavam queixa quanto à produção verbal (82,6%), observamos que 55,2% delas também apresentavam desvios na compreensão verbal. O comprometimento da produção verbal ocorreu em nível fonológico (97,3%), semântico (76,3%), gramatical (78,9%) e pragmático (5,2%). CONCLUSÃO: Embora a queixa sobre prejuízos na produção verbal seja mais mencionada pelos familiares, os prejuízos na compreensão verbal também são evidenciados em crianças com Distúrbio de Linguagem. Esses achados confirmam a importância da realização de uma avaliação cuidadosa a partir da investigação da queixa relatada pelas famílias.

Oral narratives of children with typical language development

BACKGROUND

Development of oral narrative.

AIM

To verify narrative and pause duration, number of words and interlocutor's interventions in the oral narratives of children with typical development.

METHOD

This study involved 31 subjects divided into four groups according to age: GI (3:1 to 4:0 years), GII (4:1 to 5:0 years), GIII (5:1 to 6:0 years) and GIV (6:1 to 7:0 years). Samples of spontaneous narrative and narrative based on a book without words were video recorded, transcribed and statistically analyzed using the Fisher's exact test (nonparametric) and the linear regression model with mixed effects.

RESULTS

The results of pause duration, narrative duration and number of words were significantly higher for the narrative samples produced using a book than those obtained in the spontaneous narratives (p-value < 0.01). Regarding the number of interventions, a correlation (p-value = 0.03) between age and number of interventions was observed for the book context. It was observed that the number of interventions decrease with age.

CONCLUSION

Children presented longer narratives in the book context. However, no significant differences were observed between the age groups. The results of the study also suggest that the interlocutor's interventions become less necessary with the aging process.

Factors affecting accuracy of past tense production in children with specific language impairment and their typically developing peers: the influence of verb transitivity, clause location, and sentence type

PURPOSE

The author examined the influence of sentence type, clause order, and verb transitivity on the accuracy of children's past tense productions. All groups of children, but especially children with specific language impairment (SLI), were predicted to decrease accuracy as linguistic complexity increased.

METHOD

The author elicited past tense productions in 2-clause sentences from 5- to 8-year-old children with SLI (n=14) and their typically developing peers (n=24). The target sentences varied in the type and obligatory nature of the second clause and the number of arguments.

RESULTS

On average, 85% of the responses across all groups and sentence types contained 2 clauses. Fewer 2-clause sentences were produced in the complement clause condition than in the other conditions. Sentence type and clause order, but not argument structure, influenced use of past tense. Children with SLI had a similar but less accurate profile as compared with the age-matched group. The younger mean length of utterance (MLU)-matched group reflected decreased accuracy with each additional source of linguistic complexity.

CONCLUSIONS

Increased syntactic difficulty decreases use of morphology for all children, supporting the hypothesis that processing demands influence morphological accuracy. MLU-matched children, but not children with SLI, were more affected by changes in linguistic complexity. Further work on age-related changes in sentence production is necessary.

Word learning in children with primary language impairment: a meta-analysis

PURPOSE

The present study is a meta-analysis that examines the difference in novel word learning performance between children with primary language impairment (LI) and typically developing children. Participant and task characteristics were examined as variables that potentially moderated children's word learning.

METHOD

Eight hundred and forty-six published studies were retrieved from conventional databases (PsycINFO, MEDLINE, and Web of Science). Of these studies, 28 met the criteria for inclusion in the meta-analysis, yielding 244 effect sizes across experimental conditions.

RESULTS

LI groups showed significantly lower word learning performance than typical age-matched groups and equivalent performance to typical language-matched groups. Moderator analyses showed that the magnitude of the group difference relative to age peers was significantly associated with participants' chronological age, receptive language and cognitive abilities, task and novel word type, and the extent of novel word exposure.

CONCLUSION

The difference in novel word learning performance between children with LI and age-matched children is strongly affected by task and participant characteristics in the primary studies.

Hesitation patterns in third grade children's derived word productions

Hesitations have been considered to serve both cognitive and linguistic functions. This study presents analyses of children's hesitations while producing English derived words with the suffix -ity. Two questions were considered: Do children's linguistic skills influence their use and frequency of hesitations when producing derived words, and do children's use of hesitations vary as a function of word frequency. Eight real words derived with the suffix -ity were produced by 20 third grade children and analysed for different hesitation types. Four of the target words were high in lexical frequency, and four were low in lexical frequency. Results indicated varying hesitation patterns based upon stress accuracy skill. Children with good stress accuracy skills tended to produce false starts, whereas children with poor stress accuracy skills tended to produce glottal stops and intra-word pauses. Word frequency had a specific effect only for children with good stress accuracy skills.

Is expressive language disorder an accurate diagnostic category?

PURPOSE

To propose that the diagnostic category of "expressive language disorder" as distinct from a disorder of both expressive and receptive language might not be accurate.

METHOD

Evidence that casts doubt on a pure form of this disorder is reviewed from several sources, including the literature on genetic findings, theories of language impairments, and the outcomes of late talkers with expressive language delays. Areas of language that are problematic in production but not readily amenable to comprehension testing are also discussed.

CONCLUSIONS

The notion of expressive language disorder has been formalized in classification systems and is implicit if not explicit in the organization of many standardized tests. However, a close inspection of the evidence suggests that deficits in language expression are typically accompanied by limitations in language knowledge or difficulties processing language input. For this reason, the diagnostic category of expressive language disorder should be used with considerable caution. This view has implications for both research and clinical practice.