Speech and non-speech processing in people with specific language impairment: A behavioural and electrophysiological study
Speech and non-speech processing in people with specific language impairment: A behavioural and electrophysiological study
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DOI：
10.1016/j.bandl.2005.01.002
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发表时间：
2005-09-01
影响因子：
2.5
通讯作者：
Bishop, DVM
中科院分区：
文献类型：
--
作者：
McArthur, GM;Bishop, DVM
麦克阿瑟and Bishop（2004）发现，14岁以下的特定语言障碍（SLI）患者对25 ms纯音的行为频率辨别（FD）阈值较差，而20岁以下的SLI患者对相同音调的N1-P2-N2事件相关电位（ERP）反应异常。在本研究中，我们将这些发现扩展到更复杂的非语音和语音声音，通过比较年轻（约13岁）和老年（约17岁）青少年SLI和控制他们的行为FD阈值和N1-P2 ERP到25和250毫秒的纯音，元音和非谐波复合音。我们发现，SLI患者的一个亚组在行为和大脑水平上对音调和元音有异常反应，并且不良的处理与听觉刺激的频谱复杂性有关，而不是其语音意义。我们认为，在SLI的声音处理的研究中，听者的年龄和心理声学任务的敏感性与年龄相关的听觉技能的变化可能是至关重要的因素。(c)2005年爱思唯尔公司All rights reserved.
McArthur and Bishop (2004) found that people with specific language impairment (SLI) up to 14 years of age have poor behavioural frequency discrimination (FD) thresholds for 25-ms pure tones, while people with SLI upto 20 years of age have abnormal auditory N1-P2-N2 event-related potential (ERP) responses to the same tones. In the present study, we extended these findings to more complex non-speech and speech sounds by comparing younger (around 13 years) and older (around 17 years) teenagers with SLI and controls for their behavioural FD thresholds and N1-P2 ERPs to 25 and 250-ms pure tones, vowels, and non-harmonic complex tones. We found that a subgroup of people with SLI had abnormal responses to tones and vowels at the level of behaviour and the brain, and that poor processing was associated with the spectral complexity of auditory stimuli rather than their phonetic significance. We suggest that both the age of listeners and the sensitivity of psychoacoustic tasks to age-related changes in auditory skills may be crucial factors in studies of sound processing in SLI. (c) 2005 Elsevier Inc. All rights reserved.