Narrowing of intersensory speech perception in infancy
Narrowing of intersensory speech perception in infancy
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DOI：
10.1073/pnas.0904134106
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发表时间：
2009-06-30
影响因子：
11.1
通讯作者：
Sebastian-Galles, Nuria
中科院分区：
文献类型：
--
作者：
Pons, Ferran;Lewkowicz, David J.;Sebastian-Galles, Nuria
传统观点认为，知觉/认知发展是一个渐进的习得过程。然而，一些惊人的发现表明，随着婴儿获得本地感知输入的经验，生命早期出现的对非母语语言、面孔、发声和音乐的敏感性下降。在语言领域，敏感度的下降反映在感知变窄的过程中，这一过程被认为在母语语音系统的习得过程中起着关键作用。在这里，我们提供的证据表明，这种下降也发生在婴儿对多感官语言的反应。我们发现，婴儿对非母语语音对比的感觉间反应在6到11个月之间减弱，这表明感知系统越来越倾向于关键的母语视听对应。我们的研究结果支持这样一种观点，即感知变窄是一个普遍的领域，也是一个泛感觉的发展过程。
The conventional view is that perceptual/cognitive development is an incremental process of acquisition. Several striking findings have revealed, however, that the sensitivity to non-native languages, faces, vocalizations, and music that is present early in life declines as infants acquire experience with native perceptual inputs. In the language domain, the decline in sensitivity is reflected in a process of perceptual narrowing that is thought to play a critical role during the acquisition of a native-language phonological system. Here, we provide evidence that such a decline also occurs in infant response to multisensory speech. We found that infant intersensory response to a non-native phonetic contrast narrows between 6 and 11 months of age, suggesting that the perceptual system becomes increasingly more tuned to key native-language audiovisual correspondences. Our findings lend support to the notion that perceptual narrowing is a domain-general as well as a pan-sensory developmental process.