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Vowel Accuracy and Segmental Variability Differentiate Children With Developmental Language Disorder in Nonword Repetition.

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Title: Vowel Accuracy and Segmental Variability Differentiate Children With Developmental Language Disorder in Nonword Repetition.
Authors: Vuolo, Janet1 vuolo.4@osu.edu, Goffman, Lisa2
Source: Journal of Speech, Language & Hearing Research. Dec2020, Vol. 63 Issue 12, p3945-3960. 16p. 4 Charts, 3 Graphs.
Subject Terms: *Repetition (Learning process), *Speech evaluation, Vowels, Language disorders in children, Kinematics, Descriptive statistics, One-way analysis of variance
Abstract: Purpose: Poor nonword repetition accuracy is a hallmark of children with developmental language disorder (DLD). However, other diagnostic categories also show impaired nonword repetition performance relative to children with typical development (TD); therefore, this task is currently a sensitive but nonspecific index of DLD. In this study, we investigated segmental and kinematic aspects of nonword repetition performance to further specify the diagnostic utility of nonword repetition tasks (NRTs) in diagnosing DLD. Method: Forty children, ages 48--86 months, participated, including children with DLD (n = 12), speech sound disorder (SSD; n = 14), and TD (n = 14). All children completed an assessment battery to determine group classification, a classic NRT (Dollaghan & Campbell, 1998), and an experimental NRT designed to measure segmental and articulatory (specifically lip aperture) variability. We assessed nonword repetition accuracy in the classic and experimental NRTs and segmental and kinematic variability in the experimental NRT. Results: In both the classic and experimental NRTs, children with SSD and DLD produced nonwords with lower phoneme and consonant accuracy compared to children with TD. Children with DLD produced more vowel errors compared to children with TD in both tasks. In the experimental NRT, children with DLD produced nonwords with high levels of segmental variability compared to children with TD. Children with SSD did not differ from children with TD or children with DLD in the vowel accuracy or the segmental variability measures. The articulatory variability measure did not reveal any group differences. Conclusions: In the presence of speech sound difficulties, low nonword repetition accuracy does not aid in the diagnosis of DLD. However, vowel accuracy and segmental variability appear specific to DLD status in NRTs. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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  Data: Vowel Accuracy and Segmental Variability Differentiate Children With Developmental Language Disorder in Nonword Repetition.
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  Data: <searchLink fieldCode="AR" term="%22Vuolo%2C+Janet%22">Vuolo, Janet</searchLink><relatesTo>1</relatesTo><i> vuolo.4@osu.edu</i><br /><searchLink fieldCode="AR" term="%22Goffman%2C+Lisa%22">Goffman, Lisa</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Speech%2C+Language+%26+Hearing+Research%22">Journal of Speech, Language & Hearing Research</searchLink>. Dec2020, Vol. 63 Issue 12, p3945-3960. 16p. 4 Charts, 3 Graphs.
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  Data: *<searchLink fieldCode="DE" term="%22Repetition+%28Learning+process%29%22">Repetition (Learning process)</searchLink><br />*<searchLink fieldCode="DE" term="%22Speech+evaluation%22">Speech evaluation</searchLink><br /><searchLink fieldCode="DE" term="%22Vowels%22">Vowels</searchLink><br /><searchLink fieldCode="DE" term="%22Language+disorders+in+children%22">Language disorders in children</searchLink><br /><searchLink fieldCode="DE" term="%22Kinematics%22">Kinematics</searchLink><br /><searchLink fieldCode="DE" term="%22Descriptive+statistics%22">Descriptive statistics</searchLink><br /><searchLink fieldCode="DE" term="%22One-way+analysis+of+variance%22">One-way analysis of variance</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Purpose: Poor nonword repetition accuracy is a hallmark of children with developmental language disorder (DLD). However, other diagnostic categories also show impaired nonword repetition performance relative to children with typical development (TD); therefore, this task is currently a sensitive but nonspecific index of DLD. In this study, we investigated segmental and kinematic aspects of nonword repetition performance to further specify the diagnostic utility of nonword repetition tasks (NRTs) in diagnosing DLD. Method: Forty children, ages 48--86 months, participated, including children with DLD (n = 12), speech sound disorder (SSD; n = 14), and TD (n = 14). All children completed an assessment battery to determine group classification, a classic NRT (Dollaghan & Campbell, 1998), and an experimental NRT designed to measure segmental and articulatory (specifically lip aperture) variability. We assessed nonword repetition accuracy in the classic and experimental NRTs and segmental and kinematic variability in the experimental NRT. Results: In both the classic and experimental NRTs, children with SSD and DLD produced nonwords with lower phoneme and consonant accuracy compared to children with TD. Children with DLD produced more vowel errors compared to children with TD in both tasks. In the experimental NRT, children with DLD produced nonwords with high levels of segmental variability compared to children with TD. Children with SSD did not differ from children with TD or children with DLD in the vowel accuracy or the segmental variability measures. The articulatory variability measure did not reveal any group differences. Conclusions: In the presence of speech sound difficulties, low nonword repetition accuracy does not aid in the diagnosis of DLD. However, vowel accuracy and segmental variability appear specific to DLD status in NRTs. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1044/2020_JSLHR-20-00166
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Speech evaluation
        Type: general
      – SubjectFull: Vowels
        Type: general
      – SubjectFull: Language disorders in children
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      – SubjectFull: Kinematics
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      – SubjectFull: Descriptive statistics
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      – SubjectFull: One-way analysis of variance
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      – TitleFull: Vowel Accuracy and Segmental Variability Differentiate Children With Developmental Language Disorder in Nonword Repetition.
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              Text: Dec2020
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              Y: 2020
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