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KMID : 1036820180230040971
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Communication Sciences & Disorders
2018 Volume.23 No. 4 p.971 ~ p.981
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Effects of the Word Frequency and the Phonetic Complexity on Lexical Retrieval in Children with Pure Speech Sound Disorders
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Kim Na-Yeon
Ha Ji-Wan
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Abstract
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Objectives: The current study aims to compare the lexical retrieval ability between children with pure speech sound disorders (pure SSD) and typically developing children (TD). This study also examines the influence of word frequency and phonetic complexity on the performance of a lexical retrieval task in SSD and TD groups.
Methods: The participants were 20 pure SSD and 20 TD children from 4-6 years old. All participants performed the lexical retrieval task. The total score and error score were analyzed, and the error score was used to diagnosis whether the subjects had a semantic-lexical deficit (S-L deficit) or lexical-phonological deficit (L-P deficit) using the WebFit program. Additionally, their performance was analyzed according to word frequency and phonetic complexity.
Results: The pure SSD group showed a significantly lower total score than the TD group. In the types of error, the pure SSD group showed significantly more nonword errors than the TD group. The pure SSD group showed more L-P deficits than TD group in the WebFit program, but the difference between groups were not significant. Both groups showed lower ability in low frequency words compared to high frequency words. Also, both groups showed lower ability in ‘high phonetic complexity level than the ‘low’ phonetic complexity level. However, there were no significant differences between the groups in the phonetic complexity ‘high’.
Conclusion: The study results indicate that the pure SSD group had lower lexical retrieval ability than the TD group. These results suggest that articulatory and lexical levels are interactive.
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KEYWORD
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Speech sound disorder, Lexical retrieval, Word frequency, Phonetic complexity
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