Rate-of-processing ability in children using cochlear implants and its relevance to speech perception.
Rate-of-processing ability in children using cochlear implants and its relevance to speech perception.
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DOI：
10.1179/cim.2002.3.2.126
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发表时间：
2002-09-01
影响因子：
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通讯作者：
Clark, G M
中科院分区：
文献类型：
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作者：
Dawson, P W;McKay, C M;Clark, G M
目的是评估使用人工耳蜗的幼儿在刺激持续时间缩短和刺激间隔缩短的条件下处理刺激位置变化的能力。该研究调查了这种能力是否在电极辨别能力（在先前的研究中测量）所解释的方差之外，对儿童言语表现的方差有显著的解释作用。采用游戏测听程序的一种改进方法，对17名年龄在4到10岁之间的儿童的“处理速度”能力进行了评估。最初，当在相对“缓慢”的条件下，参考电极上的重复刺激“转变”为不同电极时，要求儿童以类似游戏的运动反应作出回应。然后，当刺激持续时间和刺激之间的时间间隔缩短时，要求儿童对这种“变化”作出反应。除了一名儿童外，所有使用人工耳蜗的儿童在所有评估的刺激持续时间和刺激间隔条件下的得分都显著高于随机水平。也就是说，当这些变化在时间上更快地发生时，他们能够辨别位置音调的变化。进行了逐步回归分析，以确定包括处理速度能力在内的多个变量在解释儿童言语感知表现（在先前的研究中测量）方差中的相对贡献。处理速度能力并没有在电极辨别能力所解释的方差之外解释任何方差，而在先前的研究中，电极辨别能力被发现是这组儿童言语感知表现最显著的预测因素。
The aim was to assess the ability of young children using cochlear implants to process a change in place of stimulation under conditions of shortened stimulus duration and shortened interstimulus interval. The study investigated whether or not this ability accounted for a significant amount of the variance in the speech performance of the children additional to the variance accounted for by electrode discrimination ability (measured in a previous study). An adaptation of the play audiometry procedure was used to assess 'rate-of-processing' ability in 17 children aged between 4 and 10 years. Initially the child was required to respond with a game-like motor response when a repeating stimulation on a reference electrode 'changed' to a different electrode in relatively 'slow' conditions. The child was then required to respond to the 'change', when the duration of the stimuli and the time interval between the stimuli were decreased. All but one of the children using cochlear implants scored significantly above chance for all conditions of stimulus duration and interstimulus interval assessed. That is, they were able to discriminate place pitch changes when these changes occurred more rapidly in time. A stepwise regression was computed to determine the relative contributions of a number of variables, including rate-of-processing ability, in accounting for variance in the children's speech perception performance (measured in a previous study). Rate-of-processing ability did not account for any variance additional to that accounted for by electrode discrimination ability, which was found to be the most significant predictor of speech perception performance for this group of children in the previous study.