Weber Christiane, Hahne Anja, Friedrich Manuela, Friederici Angela D
Max Planck Institute of Cognitive Neuroscience, P.O. Box 500 355, 04303 Leipzig, Germany.
Brain Res Cogn Brain Res. 2004 Jan;18(2):149-61. doi: 10.1016/j.cogbrainres.2003.10.001.
Language acquisition crucially depends on the ability of the child to segment the incoming speech stream. Behavioral evidence supports the hypothesis that infants are sensitive to the rhythmic properties of the language input. We recorded event-related potentials (ERPs) to varying stress patterns of two syllable items in adults as well as in 4- and 5-month-old infants using a mismatch negativity (MMN) paradigm. Adult controls displayed a typical MMN to the trochaic item (stress on the first syllable) as well as to the iambic (stress on the second syllable) item. At the age of 4 months, no reliable discrimination response was seen. However, at the age of 5 months, a significant mismatch response (MMR) was observed for the trochaic item, indicating that the trochee, i.e. the most common stress pattern in German, was separated consistently from the iambic item. Hence, the present data demonstrate a clear development between 4 and 5 months with respect to the processing of different stress patterns relevant for word recognition. Moreover, possible contributions of different filter settings to the morphology of the mismatch response in infants are discussed.
语言习得关键取决于儿童对传入语音流进行切分的能力。行为证据支持这样一种假说，即婴儿对语言输入的节奏特性敏感。我们使用失匹配负波（MMN）范式，记录了成人以及4个月和5个月大婴儿对两个音节项目不同重音模式的事件相关电位（ERP）。成年对照组对扬抑抑格项目（重音在第一个音节）以及抑扬格（重音在第二个音节）项目表现出典型的MMN。在4个月大时，未观察到可靠的辨别反应。然而，在5个月大时，观察到对扬抑抑格项目有显著的失匹配反应（MMR），这表明扬抑抑格，即德语中最常见的重音模式，与抑扬格项目能够持续区分开来。因此，目前的数据表明，在4到5个月之间，对于与单词识别相关的不同重音模式的处理有明显的发展。此外，还讨论了不同滤波设置对婴儿失匹配反应形态的可能影响。
