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KMID : 1036820190240041015
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Communication Sciences & Disorders
2019 Volume.24 No. 4 p.1015 ~ p.1025
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Articulatory Consistency for Differential Diagnosis of Speech Sound Disorders
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Ha Seung-Hee
Seo Dong-Gi
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Abstract
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Objectives: This study aimed to examine developmental patterns of articulatory consistency in typically developing children and children with speech sound disorders, and to identify a cutoff score for differentiating between normal variation and inconsistent productions.
Methods: This study included 524 children aged between 2;0 and 9;11. They were asked to produce 22 words on three separate occasions. Consistency scores were calculated based on the phonetic transcription of each response. Statistical analyses were performed to investigate whether consistency was different across age groups between typically developing children and children with speech sound disorders and to identify a cutoff score for differentiating inconsistency from normal variation.
Results: The results showed that there were significant main effects and no interaction effect between age and groups. Both typically developing children and children with speech sound disorders showed higher accuracy and consistency of articulation as they grow up. In particular, consistent scores of 4- to 6-year-old children were significantly higher than those of 2- and 3-year-old children. Children’s word productions were highly consistent at 4.5 years of age. This study suggested that a cutoff score of 27 could be used to differentiate inconsistent speech sound disorders from typical speech sound development and other types of speech sound disorders.
Conclusion: This study suggested a foundation for differential diagnosis of speech sound disorders. Further investigations are needed to test the sensitivity and specificity of the cutoff score for differential diagnosis of speech sound disorders.
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KEYWORD
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Speech sound disorders, Differential diagnosis, Articulatory consistency, Inconsistent speech disorders, Consistent scores, Cutoff scores
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