Contribution of auditory working memory to speech understanding in mandarin-speaking cochlear implant users.
Contribution of auditory working memory to speech understanding in mandarin-speaking cochlear implant users.
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听觉工作记忆对普通话人工耳蜗使用者言语理解的贡献
DOI：
10.1371/journal.pone.0099096
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Chen B
中科院分区：
文献类型：
--
作者：
Tao D;Deng R;Jiang Y;Galvin JJ 3rd;Fu QJ;Chen B
目的探讨普通话人工耳蜗术后听觉工作记忆与言语感知能力的关系。方法对普通话受试者和听力正常受试者进行听觉工作记忆和言语知觉测试。用前向数字广度和后向数字广度测量工作记忆容量，用清晰度测量工作记忆效率。言语知觉的评估包括：(A)安静状态下的句中字识别，(B)+5dB信噪比的语音形状稳定噪声中的句中词识别，(C)安静状态下的汉语双音节识别，(D)安静状态下的汉语词汇声调识别。还收集了关于功课表现的自我报告的学校排名。结果CI受试者的听觉工作记忆和言语表现存在较大的被试间差异。CI组的工作记忆和言语表现明显比NH组差。对于CI和NH参与者来说，这三项工作记忆测试彼此之间具有很强的相关性。在控制人口统计变量的同时，对CI数据进行了偏相关分析。只有当工作记忆容量被分割时，工作记忆效率才与安静时的句子识别显著相关。当效率被分离时，工作记忆容量与双音节再认和学校排名相关。在目前的CI参与者中，工作记忆与词汇声调识别之间没有相关性。结论普通话CI患者的听觉工作记忆和言语行为能力明显低于NH听者。目前的数据表明，听觉工作记忆可能是CI使用者言语理解困难的原因之一。普通话CI使用者的研究结果与以前对英语CI使用者的听觉工作记忆研究结果一致，表明语音基音线索的词汇重要性(尽管CI编码很差)并没有影响工作记忆和言语知觉之间的关系。
Purpose To investigate how auditory working memory relates to speech perception performance by Mandarin-speaking cochlear implant (CI) users. Method Auditory working memory and speech perception was measured in Mandarin-speaking CI and normal-hearing (NH) participants. Working memory capacity was measured using forward digit span and backward digit span; working memory efficiency was measured using articulation rate. Speech perception was assessed with: (a) word-in-sentence recognition in quiet, (b) word-in-sentence recognition in speech-shaped steady noise at +5 dB signal-to-noise ratio, (c) Chinese disyllable recognition in quiet, (d) Chinese lexical tone recognition in quiet. Self-reported school rank was also collected regarding performance in schoolwork. Results There was large inter-subject variability in auditory working memory and speech performance for CI participants. Working memory and speech performance were significantly poorer for CI than for NH participants. All three working memory measures were strongly correlated with each other for both CI and NH participants. Partial correlation analyses were performed on the CI data while controlling for demographic variables. Working memory efficiency was significantly correlated only with sentence recognition in quiet when working memory capacity was partialled out. Working memory capacity was correlated with disyllable recognition and school rank when efficiency was partialled out. There was no correlation between working memory and lexical tone recognition in the present CI participants. Conclusions Mandarin-speaking CI users experience significant deficits in auditory working memory and speech performance compared with NH listeners. The present data suggest that auditory working memory may contribute to CI users' difficulties in speech understanding. The present pattern of results with Mandarin-speaking CI users is consistent with previous auditory working memory studies with English-speaking CI users, suggesting that the lexical importance of voice pitch cues (albeit poorly coded by the CI) did not influence the relationship between working memory and speech perception.
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影响因子：
4.1
作者：
Cowan, N;Wood, NL;Keller, CV
通讯作者：
Keller, CV
影响因子：
1.7
作者：
Baddeley, A
通讯作者：
Baddeley, A
影响因子：
1.5
作者：
Bull, R;Scerif, G
通讯作者：
Scerif, G
影响因子：
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作者：
Bruce, I A;Broomfield, S J;Ramsden, R T
通讯作者：
Ramsden, R T
影响因子：
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作者：
Diller, Gottfried
通讯作者：
Diller, Gottfried