Perception of transient nonspeech stimuli is normal in specific language impairment: Evidence from glide discrimination
Perception of transient nonspeech stimuli is normal in specific language impairment: Evidence from glide discrimination
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DOI：
10.1017/s0142716405050137
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发表时间：
2005-04-01
影响因子：
2.1
通讯作者：
Rosen, S
中科院分区：
文献类型：
--
作者：
Bishop, DVM;Adams, CV;Rosen, S
20名9至12岁的特定语言障碍（SLI）儿童与18名年龄匹配的对照组进行了听觉辨别任务的比较，使用三个间隔，两个选择的强迫选择格式。第一个任务在安静和噪音中使用最少的单词对。非言语任务涉及辨别频率滑动的方向，并且有两个版本：（a）滑动从500到1500 Hz移动，并且持续时间自适应地减小;（B）所有滑动持续250 ms，并且频率范围自适应地修改，直到达到阈值。控制组和SLI组在滑行任务上没有差异。两组中大约有一半的孩子准确地分辨出了20毫秒的滑行。有一个小的，但显着的组间差异的语音在噪音的任务，分数弱相关的识字水平。多数学龄期SLI儿童对短暂、短暂、非言语刺激的感知并不异常。
Twenty 9- to 12-year-olds with specific language impairment (SLI) were compared with 18 age-matched controls on auditory discrimination tasks, using a three-interval, two-alternative forced-choice format. The first task used minimal word pairs in silence and in noise. Nonspeech tasks involved discriminating direction of frequency glides and had two versions: (a) the glide moved from 500 to 1500 Hz, and duration was adaptively decreased; (b) all glides lasted 250 ms, and the frequency range was adaptively modified until a threshold was reached. Control and SLI groups did not differ on, the glide tasks. Around half the children in both groups accurately discriminated 20 ms glides. There was a small but significant group difference on the speech-in-noise task, and scores were weakly related to literacy level. Perception of brief, transient, nonspeech stimuli is not abnormal in the majority of school-aged children with SLI.