Hearing and Speech Sciences

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https://ir.vanderbilt.edu/handle/1803/9551
The Vanderbilt University Graduate Program in Hearing and Speech Sciences was established in 1951. It is currently the largest non-M.D. program in the School of Medicine and one of the largest programs at Vanderbilt University.

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    Estimates of the Prevalence of Speech and Motor Speech Disorders in Adolescents with Down syndrome
    (CLINICAL LINGUISTICS & PHONETICS, 2019-08) Abbeduto, Leonard; Camarata, Stephen M.; Shriberg, Lawrence D.
    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 20years 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.Abbreviations: CAS: Childhood Apraxia of Speech; CD: Childhood Dysarthria; DS: Down syndrome; NSA: Normal(ized) Speech Acquisition; PSD: Persistent Speech Delay; PSE: Persistent Speech Errors; SD: Speech Delay; SDCS: Speech Disorders Classification System; SE: Speech Errors; SMD: Speech Motor Delay
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    Diversity of Research Participant Race, Ethnicity, and Gender in Communication Sciences and Disorders: A Review of Recent ASHA Publications
    (2023) Millager, Ryan; Feldman, Jacob; Williams, Zachary; Shibata, Kiiya; Martinez-Torres, Keysha; Bryan, Katherine; Pruett, Dillon; Mitchell, Jade; Markfeld, Jennifer; Merritt, Brandon; Daniels, Derek; Jones, Robin; Woynaroski, Tiffany
    Dataset and supplementary materials for Millager et al. (in preparation).
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    A Year in Stuttering Research: A Systematic Review of Global Representation and Sociodemographic Reporting Practices in English-Language Journals in 2020
    (2024) Millager, Ryan; Liu, Talia; Pruett, Dillon; Jones, Robin
    Purpose: Demographic data is inconsistently reported and defined in communication sciences and disorders research, yet gender, ethnicity, and socioeconomic status (SES) may be critical considerations for investigations of stuttering. Therefore, the purpose of this study is to evaluate the global scope and sociodemographic reporting practices among stuttering research published in the year 2020. Methods: Article searches were conducted in February 2023 in PsycINFO, PubMed, and ASHAWire for studies sampling participants with developmental stuttering or cluttering. Further inclusion criteria for systematic review were that articles must: (a) be published in the year 2020, (b) be published in a peer-reviewed journal, and (c) present original empirical research. Participant gender, ethnicity, and SES were extracted via a manualized coding scheme. Results: The total corpus for review included k = 92 articles, representing a total n = 7,342 participants recruited from 26 different countries. The majority of articles (k = 36) were based in the United States (US), with all other countries contributing between 1 and 5 articles each. Gender (or sex) was reported in 93.5% of included studies, ethnicity in 22.8%, and SES in 41.3%. Reporting practices did not significantly differ between US and non-US countries. Of note, only one article in 2020 recruited participants who clutter, with all others recruiting participants who stutter. Conclusion: This is the first systematic review of diversity and reporting practices in the global stuttering research literature. Our results revealed a narrow global distribution of research participants, with limited reporting and analyses regarding participant ethnicity or SES. Consequently, we have identified opportunities to improve research participant transparency and to further consider sociocultural variables toward the advancement of global and inclusive stuttering research.