Bass-Ringdahl Sandie M
Department of Communication Sciences and Disorders, The University of Iowa, 125C WJSHC, Iowa City, IA 52242-1012, USA.
J Deaf Stud Deaf Educ. 2010 Summer;15(3):287-310. doi: 10.1093/deafed/enq013. Epub 2010 May 10.
This article investigated the relationship between age at onset of canonical babbling and audibility of amplified speech in children with hearing impairment. Thirteen children with severe-profound hearing impairment and two children with normal hearing participated in a longitudinal investigation of vocalization development. A nonconcurrent multiple baseline design was used to analyze vocalization recordings obtained during two phases (hearing aid [HA] and cochlear implant [CI]). Audibility during HA and CI use was calculated using the Speech Intelligibility Index (SII). Earlier ages of canonical babble onset were related to greater audibility of the speech signal during HA use. Children who developed canonical babble had an SII of .35 or greater. SII was a statistically significant predictor of age of onset of canonical babble. Results support the concept of an "essential" level of audibility for onset of canonical babble. Findings are discussed relative to their methodological and clinical implications regarding treatment decision making.
本文研究了听力障碍儿童典型牙牙学语开始的年龄与放大语音可听度之间的关系。13名重度至极重度听力障碍儿童和2名听力正常儿童参与了发声发育的纵向研究。采用非同期多重基线设计分析在两个阶段(助听器[HA]和人工耳蜗[CI])获得的发声记录。使用言语可懂度指数(SII)计算HA和CI使用期间的可听度。典型牙牙学语开始的年龄越早,与HA使用期间语音信号的可听度越高有关。出现典型牙牙学语的儿童的SII为0.35或更高。SII是典型牙牙学语开始年龄的统计学显著预测指标。结果支持典型牙牙学语开始存在“必要”可听度水平的概念。讨论了研究结果在治疗决策方面的方法学和临床意义。