Audio-visual speech perception: a developmental ERP investigation.
Audio-visual speech perception: a developmental ERP investigation.
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DOI：
10.1111/desc.12098
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发表时间：
2014-01
影响因子：
3.7
通讯作者：
Thomas MS
中科院分区：
文献类型：
--
作者：
Knowland VC;Mercure E;Karmiloff-Smith A;Dick F;Thomas MS
能够看到一张会说话的脸对成年人的言语感知有相当大的优势。然而，目前的行为数据表明，儿童未能充分利用这些可用的视觉语言线索，直到8岁或9岁。考虑到在语言学习过程中多种信息线索的潜在效用，这是特别令人惊讶的。因此，我们在神经水平上探索了这一点。事件相关电位（ERP）技术已被用于评估成人视听言语知觉的机制，视觉线索可靠地调节听觉ERP对言语的反应。以前的工作已经表明，一致性依赖缩短听觉N1/P2潜伏期和一致性独立衰减的幅度在听觉和视觉语音信号的存在下，相比听觉单独。本研究的目的是绘制这些成熟的调节作用在儿童中后期的发展。实验1采用了一个成年人的样本，以验证儿童友好的刺激集和范式复制先前观察到的影响N1/P2的振幅和潜伏期调制的视觉语音线索，它也揭示了更大的衰减分量振幅不一致的视听刺激，指向一个新的解释的振幅调制效应。实验2使用相同的范式映射横截面的发展变化，这些ERP反应之间的6和11岁。视觉线索的振幅调制的效果出现在发展，而潜伏期调制的效果是稳定的儿童样本。这些数据表明，听觉ERP调制视觉语音代表可分离的潜在的认知过程，其中一些显示出较早的成熟比别人在发展过程中。
Being able to see a talking face confers a considerable advantage for speech perception in adulthood. However, behavioural data currently suggest that children fail to make full use of these available visual speech cues until age 8 or 9. This is particularly surprising given the potential utility of multiple informational cues during language learning. We therefore explored this at the neural level. The event-related potential (ERP) technique has been used to assess the mechanisms of audio-visual speech perception in adults, with visual cues reliably modulating auditory ERP responses to speech. Previous work has shown congruence-dependent shortening of auditory N1/P2 latency and congruence-independent attenuation of amplitude in the presence of auditory and visual speech signals, compared to auditory alone. The aim of this study was to chart the development of these well-established modulatory effects over mid-to-late childhood. Experiment 1 employed an adult sample to validate a child-friendly stimulus set and paradigm by replicating previously observed effects of N1/P2 amplitude and latency modulation by visual speech cues; it also revealed greater attenuation of component amplitude given incongruent audio-visual stimuli, pointing to a new interpretation of the amplitude modulation effect. Experiment 2 used the same paradigm to map cross-sectional developmental change in these ERP responses between 6 and 11 years of age. The effect of amplitude modulation by visual cues emerged over development, while the effect of latency modulation was stable over the child sample. These data suggest that auditory ERP modulation by visual speech represents separable underlying cognitive processes, some of which show earlier maturation than others over the course of development.
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影响因子：
56.9
作者：
Calvert, GA;Bullmore, ET;David, AS
通讯作者：
David, AS
影响因子：
2.8
作者：
Besle, Julien;Bertrand, Olivier;Giard, Marie-Helene
通讯作者：
Giard, Marie-Helene
影响因子：
9.2
作者：
Calvert, GA;Campbell, R;Brammer, MJ
通讯作者：
Brammer, MJ
影响因子：
3.2
作者：
Hall, DA;Fussell, C;Summerfield, AQ
通讯作者：
Summerfield, AQ
DOI：
10.1098/rstb.2007.2155
发表时间：
2008-03-12
影响因子：
6.3
作者：
Campbell, Ruth
通讯作者：
Campbell, Ruth