Understanding the neural mechanisms for infants' perception of native and non-native speech

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Liquan Liu , Varghese Peter , Michael D. Tyler
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引用次数: 1

Abstract

Though perceptual narrowing has been widely recognized as a process guiding cognitive development and category learning in infancy and early childhood, its neural mechanisms and traits at a cortical level remain unclear. Using an electroencephalography (EEG) abstract mismatch negativity (MMN) paradigm, Australian infants’ neural sensitivity to (native) English and (non-native) Nuu-Chah-Nulth speech contrasts was examined in a cross-sectional design at the onset (5–6 months) and offset (11–12 months) of perceptual narrowing. Immature mismatch responses (MMR) were observed among younger infants for both contrasts, while older infants showed MMR response to the non-native contrast, and both MMR and MMN to the native contrast. Sensitivity to the Nuu-Chah-Nulth contrast at perceptual narrowing offset was retained yet stayed immature. Findings conform to perceptual assimilation theories, reflecting plasticity in early speech perception and development. Compared to behavioural paradigms, neural examination effectively reveals experience-induced processing differences to subtle contrasts at the offset of perceptual narrowing.

了解婴儿对母语和非母语语言感知的神经机制
尽管感知狭窄已被广泛认为是指导婴儿期和幼儿期认知发展和类别学习的一个过程,但其皮层水平的神经机制和特征仍不清楚。使用脑电图(EEG)抽象错配负性(MMN)范式,在感知狭窄开始(5-6个月)和抵消(11-12个月)时的横断面设计中检查了澳大利亚婴儿对(母语)英语和(非母语)Nuu Chah Nulth语音对比的神经敏感性。在年龄较小的婴儿中观察到两种对比剂的未成熟错配反应(MMR),而年龄较大的婴儿对非天然对比剂表现出MMR反应,MMR和MMN对天然对比剂都表现出MMR。在感知变窄偏移时,对Nuu Chah Nulth对比度的敏感性保持不变,但仍不成熟。研究结果符合感知同化理论,反映了早期言语感知和发展的可塑性。与行为范式相比,神经检查有效地揭示了经验诱导的加工差异,以抵消感知变窄的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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