Infant-directed speech facilitates seven-month-old infants' cortical tracking of speech.
Infant-directed speech facilitates seven-month-old infants' cortical tracking of speech.
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DOI：
10.1038/s41598-018-32150-6
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发表时间：
2018-09-13
影响因子：
4.6
通讯作者：
Burnham D
中科院分区：
文献类型：
--
作者：
Kalashnikova M;Peter V;Di Liberto GM;Lalor EC;Burnham D
这项研究评估了七个月大婴儿的自然言语中时间信息的皮层跟踪。皮层跟踪是指神经活动遵循语音输入的动态模式的过程。在成年人中，它已被证明涉及注意力机制并促进有效的语音编码。然而，在婴儿中，皮层跟踪或其对语音处理的影响尚未得到研究。这项研究测量了婴儿言语的皮层跟踪，并且考虑到这一过程中注意力机制的参与，对对婴儿极具吸引力的婴儿定向言语（IDS）和不太吸引人的成人定向言语（ADS）的皮质跟踪进行了比较。 IDS 是父母在称呼小婴儿时使用的语音记录。与 ADS 相比，它的特点是具有多种声学特性，可以吸引婴儿对语言输入的注意力并帮助语言学习。七个月大的婴儿在听 IDS 或 ADS 录音时通过脑电图记录他们的皮质反应。结果表明，IDS 中的语音包络低频皮质跟踪比 ADS 中更强。这表明 IDS 在促进成功的皮质跟踪传入语音方面具有特权地位，这反过来又可能增强婴儿的早期语音处理，甚至后来的语言发展。
This study assessed cortical tracking of temporal information in incoming natural speech in seven-month-old infants. Cortical tracking refers to the process by which neural activity follows the dynamic patterns of the speech input. In adults, it has been shown to involve attentional mechanisms and to facilitate effective speech encoding. However, in infants, cortical tracking or its effects on speech processing have not been investigated. This study measured cortical tracking of speech in infants and, given the involvement of attentional mechanisms in this process, cortical tracking of both infant-directed speech (IDS), which is highly attractive to infants, and the less captivating adult-directed speech (ADS), were compared. IDS is the speech register parents use when addressing young infants. In comparison to ADS, it is characterised by several acoustic qualities that capture infants’ attention to linguistic input and assist language learning. Seven-month-old infants’ cortical responses were recorded via electroencephalography as they listened to IDS or ADS recordings. Results showed stronger low-frequency cortical tracking of the speech envelope in IDS than in ADS. This suggests that IDS has a privileged status in facilitating successful cortical tracking of incoming speech which may, in turn, augment infants’ early speech processing and even later language development.
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影响因子：
25
作者：
通讯作者：
--
影响因子：
5.7
作者：
Di Liberto, Giovanni M.;Lalor, Edmund C.;Millman, Rebecca E.
通讯作者：
Millman, Rebecca E.
影响因子：
2.6
作者：
Kitamura, C;Burnham, D
通讯作者：
Burnham, D
影响因子：
2.4
作者：
Lee, Christopher S.;Kitamura, Christine;Todd, Neil P. McAngus
通讯作者：
Todd, Neil P. McAngus
影响因子：
3.7
作者：
Leong, Victoria;Goswami, Usha
通讯作者：
Goswami, Usha