Pursuing Precision Speech-Language Therapy Services for Children with Down Syndrome

McDaniel, Jena; Yoder, Paul J.

doi:10.1055/s-0036-1587708

Cited by 9 publications

(3 citation statements)

References 54 publications

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“…Overall, the present findings underscore the contribution of motor speech disorders to the complex of communication challenges for speakers with Down syndrome and highlight the need to consider the role of speech motor control during assessment and management (Namasivayam et al, 2013). If characteristics of motor speech disorders are observed at assessment, personalized treatment may require targeted precision and stability goals across multiple subsystems, including respiration, phonation, prosody, resonance, and articulation (McDaniel & Yoder, 2016; Miller & Pennington, 2011). The present findings are interpreted as support for motor speech disorders as primary explanatory constructs to guide the selection and sequencing of treatment targets within these subsystems for persons with DS.…”

Section: Discussionmentioning

confidence: 99%

Estimates of the prevalence of speech and motor speech disorders in adolescents with Down syndrome

Wilson

Abbeduto

Camarata

et al. 2019

Clinical Linguistics & Phonetics

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Although there is substantial rationale for a motor component in the speech of persons with Down syndrome (DS), there presently are no published estimates of the prevalence of subtypes of motor speech disorders in DS. The goal of this research is to provide initial estimates of the prevalence of types of speech disorders and motor speech disorders in adolescents with DS. Conversational speech samples from a convenience sample of 45 adolescents with DS, ages 10 to 20 years old, were analysed using perceptual and acoustic methods and measures in the Speech Disorders Classification System (SDCS). The SDCS cross-classified participants into five mutually exclusive speech classifications and five mutually exclusive motor speech classifications. For participants meeting criteria for Childhood Dysarthria or for Childhood Dysarthria concurrent with Childhood Apraxia of Speech, the SDCS provided information on participants’ percentile status on five subtypes of dysarthria. A total of 97.8% of participants met SDCS criteria for Speech Disorders and 97.8% met criteria for Motor Speech Disorders, including Childhood Dysarthria (37.8%), Speech Motor Delay (26.7%), Childhood Dysarthria and Childhood Apraxia of Speech (22.2%), and Childhood Apraxia of Speech (11.1%). Ataxia was the most prevalent dysarthria subtype. Nearly all participants with DS in the present sample had some type of speech and motor speech disorder, with implications for theory, assessment, prediction, and treatment. Specific to treatment, the present findings are interpreted as support for motor speech disorders as a primary explanatory construct to guide the selection and sequencing of treatment targets for persons with DS.

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Section: Discussionmentioning

confidence: 99%

Estimates of the prevalence of speech and motor speech disorders in adolescents with Down syndrome

Wilson

Abbeduto

Camarata

et al. 2019

Clinical Linguistics & Phonetics

View full text Add to dashboard Cite

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“…In a widely-cited survey, 95% of parents of children with DS were concerned about their child’s ability to be understood by listeners (Kumin, 1994). Since 2000, representative research reviews and clinical proposals to increase the intelligibility and comprehensibility of persons with DS include Barnes et al (2009); Camarata, Yoder, and Camarata (2006); Coppens-Hofman, Maassen, van Schrojenstein Lantman-de Valk, and Snik (2012); Coppens-Hofman, Terband, Snik, and Maassen (2016); Kent and Vorperian (2013); Kumin (2006); McDaniel and Yoder (2016); Roberts, Price, and Malkin (2007); Rvachew and Folden (2018); Wild, Vorperian, Kent, Bolt, and Austin (2018); Yoder, Camarata, and Woynaroski (2016); and Yoder, Woynaroski, and Camarata (2016). Although a variety of factors have been proposed to explain the intelligibility challenges of individuals with DS, the interactive contributions of multiple factors need to be modeled in a coherent explanatory framework to guide treatment.…”

Section: Down Syndrome and Intelligibilitymentioning

confidence: 99%

Speech and motor speech disorders and intelligibility in adolescents with Down syndrome

Wilson

Abbeduto

Camarata

et al. 2019

Clinical Linguistics & Phonetics

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The goal of this research was to assess the support for motor speech disorders as explanatory constructs to guide research and treatment of reduced intelligibility in persons with Down syndrome (DS). Participants were the 45 adolescents with DS in the prior paper who were classified into five mutually-exclusive motor speech classifications using the Speech Disorders Classification System. An ordinal index classified participants’ percentage of intelligible words in conversation as High (≥ 85%), Moderate (80% – 84.9%), or Low (< 80%). Statistical analyses tested for significant differences in intelligibility status associated with demographic, intelligence, and language variables, and intelligibility status associated with motor speech classifications and speech, prosody, and voice variables. For the 10 participants who met criteria for concurrent Childhood Dysarthria and Childhood Apraxia of Speech at assessment, 80% had reduced (Moderate or Low) intelligibility and 20% had High intelligibility (significant effect size: 0.644). Proportionally more of the 32 participants who met criteria for either dysarthria or apraxia had reduced intelligibility (significant effect size: 0.318). Low intelligibility was significantly associated with across-the-board reductions in phonemic and phonetic accuracy and with inappropriate prosody and voice. Findings are interpreted as support for motor speech disorders in adolescents with DS as explanatory constructs for their reduced intelligibility. Pending cross-validation of findings in diverse samples of persons with DS, studies are needed to assess the efficacy of motor speech classification status to guide selection of treatment methods and intelligibility targets.

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“…With these positive findings, more human clinical trials are imminent. Increased efforts are also being directed toward the development and evaluation of behavioral, educational, and psychosocial interventions [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Spoken language outcome measures for treatment studies in Down syndrome: feasibility, practice effects, test-retest reliability, and construct validity of variables generated from expressive language sampling

Thurman

Edgin

Sherman

et al. 2021

J Neurodevelop Disord

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Background The purpose of this study was to evaluate expressive language sampling (ELS) as a procedure for generating spoken language outcome measures for treatment research in Down syndrome (DS). We addressed (a) feasibility, (b) practice effects across two short-term administrations, (c) test-retest reliability across two short-term administrations, (d) convergent and discriminant construct validity, and (e) considered comparisons across the conversation and narration contexts. Method Participants were 107 individuals with DS between 6 and 23 years of age who presented with intellectual disability (IQ < 70). The utility of ELS procedures designed to collect samples of spoken language in conversation and narration were evaluated separately. Variables of talkativeness, vocabulary, syntax, utterance planning, and articulation quality, derived from transcripts segmented into C-units (i.e., an independent clause and its modifiers), were considered. A 4-week interval was used to assess practice effects and test-retest reliability. Standardized direct assessments and informant report measures were collected to evaluate construct validity of the ELS variables. Results Low rates of noncompliance were observed; youth who were under 12 years of age, had phrase-level speech or less, and had a 4-year-old developmental level or less were at particular risk for experiencing difficulty completing the ELS procedures. Minimal practice effects and strong test-retest reliability across the 4-week test-retest interval was observed. The vocabulary, syntax, and speech intelligibility variables demonstrated strong convergent and discriminant validity. Although significant correlations were found between the variables derived from both the conversation and narration contexts, some differences were noted. Conclusion The ELS procedures considered were feasible and yielded variables with adequate psychometric properties for most individuals with DS between 6 and 23 years old. That said, studies of outcome measures appropriate for individuals with DS with more limited spoken language skills are needed. Context differences were observed in ELS variables suggest that comprehensive evaluation of expressive language is likely best obtained when utilizing both contexts.

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Pursuing Precision Speech-Language Therapy Services for Children with Down Syndrome

Cited by 9 publications

References 54 publications

Estimates of the prevalence of speech and motor speech disorders in adolescents with Down syndrome

Estimates of the prevalence of speech and motor speech disorders in adolescents with Down syndrome

Speech and motor speech disorders and intelligibility in adolescents with Down syndrome

Spoken language outcome measures for treatment studies in Down syndrome: feasibility, practice effects, test-retest reliability, and construct validity of variables generated from expressive language sampling

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