Cunillera Toni, Toro Juan M, Sebastián-Gallés Nuria, Rodríguez-Fornells Antoni
Dep. Psicologia Bàsica, Facultat de Psicologia, Universitat de Barcelona, Spain; Dep. Psicologia. Universitat Illes Balears, Spain.
Brain Res. 2006 Dec 6;1123(1):168-78. doi: 10.1016/j.brainres.2006.09.046. Epub 2006 Oct 24.
The study of the processes involved in speech segmentation has gained special relevance in recent years by trying to establish what type of information listeners use to segment the speech signal into words. An event-related brain potential experiment was conducted in order to understand how two of these cues (statistical and stress cues) interact. The experiment consisted of the presentation of artificial speech streams in which words were marked either by statistical cues alone, or by a combination of statistical and stress cues. As a baseline, comparison streams were also created with the same syllables but organized in random order. Results showed an N400 component that marks the on-line segmentation of speech into words, and an increased positivity (P2 component) for languages that include both types of cues. Possible implications of these results for the process of speech segmentation are discussed.
近年来，通过试图确定听众使用何种类型的信息将语音信号分割成单词，对语音分割所涉及过程的研究变得格外重要。为了理解其中两种线索（统计线索和重音线索）是如何相互作用的，进行了一项事件相关脑电位实验。该实验包括呈现人工语音流，其中单词要么仅由统计线索标记，要么由统计线索和重音线索的组合标记。作为基线，还创建了由相同音节但随机排列组成的比较流。结果显示出一个标记语音在线分割成单词的N400成分，以及对于包含两种线索类型的语言有增强的正性波（P2成分）。讨论了这些结果对语音分割过程可能产生的影响。
