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KMID : 1036820160210030488
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Communication Sciences & Disorders
2016 Volume.21 No. 3 p.488 ~ p.501
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The Relationship between Vocabulary Knowledge and Speech Perception in School-Age Children using Cochlear Implants
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Park Hye-Jin
Han Sung-Ah
Choi Jae-Hee
Sim Sang-Yong
Seo Young-Ran
Jang Hyun-Sook
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Abstract
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Objectives: The purpose of this study was to investigate the relationship between receptive vocabulary knowledge and speech perception ability in children with cochlear implant (CI) after assessing vocabulary knowledge in terms of chronological and hearing age, and speech perception ability at the sentence and discourse levels.
Methods: This study included 25 children with CI who received their first CI before the age of 6, had used CIs more than 6;6 years, had no other disabilities, and were attending regular elementary or secondary schools. Receptive vocabulary knowledge and speech perception ability were assessed with the REVT (Receptive & Expressive Vocabulary Test) and 3 subtests of KNISE-DASP (Korean National Institute of Special Education-Development Assessment of Speech Perception), Sentence Comprehension Test, Sentence Recognition Test, and Connected Speech Test. Correlation analysis was also conducted between speech perception and vocabulary.
Results: The average REVT equivalent age of the CI group was delayed for 1;10 years compared to the age-matched normal hearing peers, but was placed within the average range of normal hearing children when the hearing age was matched. The participants had some difficulties in speech perception, especially at the discourse level. The speech perception ability was highly correlated with vocabulary scores, but some students had difficulties in speech perception despite vocabulary knowledge comparable to their normal hearing peers.
Conclusion: Difficulties in speech perception at the sentence and discourse levels could have resulted from a lack of vocabulary knowledge. The results suggest that aural rehabilitation programs should include treatment for the improvement of speech perception at the sentence and discourse levels.
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KEYWORD
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Hearing loss, Cochlear implant, Vocabulary, Speech perception, Sentence comprehension, Sentence recognition, Connected speech comprehension
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