Phonetics and Speech Sciences (말소리와 음성과학)

Korean Society of Speech Sciences (한국음성학회)
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Characteristics of speech rate and pause in children with spastic cerebral palsy and their relationships with speech intelligibility

경직형 뇌성마비 아동의 하위그룹별 말속도와 쉼의 특성 및 말명료도와의 관계

  • Jeong, Pil Yeon (Ewha Womans University Center for Child Development and Disability) ;
  • Sim, Hyun Sub (Department of Communication Disorders, Ewha Womans University)
  • 정필연 (이화여자대학교 아동발달센터) ;
  • 심현섭 (이화여자대학교 언어병리학과)
  • Received : 2020.07.31
  • Accepted : 2020.09.13
  • Published : 2020.09.30
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Abstract

The current study aimed to identify the characteristics of speech rate and pause in children with spastic cerebral palsy (CP) and their relationships with speech intelligibility. In all, 26 children with CP, 4 with no speech motor involvement and age-appropriate language ability (NSMI-LCT), 6 with no speech motor involvement and impaired language ability (NSMI-LCI), 6 with speech motor involvement and age-appropriate language ability (SMI- LCT), and 10 with speech motor involvement and impaired language ability (SMI-LCI) participated in the study. Speech samples for the speech rate and pause analysis were extracted using a sentence repetition task. Acoustic analysis were made in Praat. First, it was found that regardless of the presence of language impairment, significant group differences between the NSMI and SMI groups were found in speech rate and articulation rate. Second, the SMI groups showed a higher ratio of pause time to sentence production time, more frequent pauses, and longer durations of pauses than the NSMI groups. Lastly, there were significant correlations among speech rate, articulation rate, and intelligibility. These findings suggest that slow speech rate is the main feature in SMI groups, and that both speech rate and articulation rate play important roles in the intelligibility of children with spastic CP.

본 연구의 목적은 경직형 뇌성마비 아동의 하위그룹별로 말속도와 쉼에서 차이가 있는지 살펴보고, 말명료도와의 관련성에 대해서 알아보고자 하였다. 연구대상은 경직형 뇌성마비 아동 26명이 참여하였다. 말문제와 언어문제가 없는 NSMI-LCT 4명, 말문제는 없지만 언어문제가 있는 NSMI-LCI 그룹 6명, 말문제가 있지만 언어문제는 없는 SMI-LCT 6명, 말과 언어문제를 모두 동반하는 SMI-LCI 그룹 10명이 참여하였다. 연구과제는 문장 따라말하기였고, Praat을 통해 말속도, 조음속도, 쉼 시간의 비율, 평균 쉼 횟수, 평균 쉼 시간을 측정하였다. 연구결과, 첫째, 말속도와 조음속도는 언어문제의 유무와 관계없이 NSMI와 SMI 그룹 간에 유의한 차이가 나타났다. 둘째, NSMI에 비해 SMI 그룹에서에서 쉼 시간의 비율은 더 높고, 쉼 횟수는 더 빈번하였으며 쉼 시간은 더 길게 나타났다. 셋째, 말속도와 조음속도는 말명료도와 유의한 상관을 나타내었다. 본 연구의 결과는 느린 말속도가 SMI 그룹의 말산출 과정에서 나타나는 주요한 특성이고, 말명료도에 있어서 조음속도와 말속도가 중요한 역할을 함을 시사한다.

Keywords

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