An Examination of Sources of Variability Across the Consonant-Nucleus-Consonant Test in Cochlear Implant Listeners.
An Examination of Sources of Variability Across the Consonant-Nucleus-Consonant Test in Cochlear Implant Listeners.
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DOI：
10.1177/2331216516646556
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发表时间：
2016-05-17
影响因子：
2.7
通讯作者：
Wright R
中科院分区：
文献类型：
--
作者：
Bierer JA;Spindler E;Bierer SM;Wright R
10个辅音-核心-辅音（CNC）单词列表被认为是测试人工耳蜗（CI）用户的金标准。然而，在列表中的分数的变化可能会降低他们的灵敏度和可靠性，以确定语音感知的缺陷。本研究探讨了词汇表的词汇特征和词汇表之间的差异性。数据来自28名成年CI用户。每个受试者都测试了所有10个CNC单词列表。数据进行了分析的词汇特征，词频，邻里密度，双，三音素的概率。为了确定是否可以减少列表中的个体表现差异，使用两种抽样策略将标准的10个语音平衡的50个单词列表重新分配到一组新的列表中：（a）相对于单词词频的平衡或（B）选择具有相等概率的单词。CNC列表的平均性能从53.1%到62.4%不等。名单中个人最高和最低得分之间的平均差异为20.9%（从12%到28%）。词汇频率和双音素概率与单词识别性能相关。使用这两种类型的抽样方法，用1,000套重新分发的名单模拟回答时，所有个人的得分范围并没有显著减少。这些结果表明，重新测试的话不影响重测信度和诊断价值的CNC字测试。
The 10 consonant-nucleus-consonant (CNC) word lists are considered the gold standard in the testing of cochlear implant (CI) users. However, variance in scores across lists could degrade the sensitivity and reliability of them to identify deficits in speech perception. This study examined the relationship between variability in performance among lists and the lexical characteristics of the words. Data are from 28 adult CI users. Each subject was tested on all 10 CNC word lists. Data were analyzed in terms of lexical characteristics, lexical frequency, neighborhood density, bi-, and tri-phonemic probabilities. To determine whether individual performance variability across lists can be reduced, the standard set of 10 phonetically balanced 50-word lists was redistributed into a new set of lists using two sampling strategies: (a) balancing with respect to word lexical frequency or (b) selecting words with equal probability. The mean performance on the CNC lists varied from 53.1% to 62.4% correct. The average difference between the highest and lowest scores within individuals across the lists was 20.9% (from 12% to 28%). Lexical frequency and bi-phonemic probabilities were correlated with word recognition performance. The range of scores was not significantly reduced for all individuals when responses were simulated with 1,000 sets of redistributed lists, using both types of sampling methods. These results indicate that resampling of words does not affect the test–retest reliability and diagnostic value of the CNC word test.