Second language acquisition across modalities: Production variability in adult L2 learners of American Sign Language
Second language acquisition across modalities: Production variability in adult L2 learners of American Sign Language
复制标题
跨模式的第二语言习得：美国手语成人二语学习者的生产变异性
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Matthew W. G. Dye
中科院分区：
文献类型：
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作者：
A. Hilger;T. Loucks;D. Quinto;Matthew W. G. Dye
一项研究对美国手语（ASL）的生产变异性进行了研究，以深入了解以另一种情态产生的语言的运动控制发展。生产变异性通过时空指数（STI）来表征，STI代表整个话语的生产稳定性，是效应位移波形变异性的函数（Smith et al., 1995）。运动捕捉装置通过嵌入在载体短语中的一组8个目标符号来获取手腕位移数据。我们比较了聋人手语学习者和听力学习者在三种不同的美国手语经验水平下的STI值，以确定生产稳定性是否随学习美国手语时间的变化而变化。我们假设，对于初学美国手语的学习者来说，较低的产出稳定性（如STI所示）是明显的，这表明更大的产出可变性，随着美国手语语言经验的增加，可变性会减少。正如预测的那样，聋人手语者的STI值明显低于听力学习者，这表明生产的稳定性确实是增加美国手语使用的特征。听力学习者不同经验水平的线性趋势在所有空间维度上均不具有统计学意义，表明在相对较短时间尺度上生产稳定性的改善较弱。这种表征美国手语话语产生稳定性的新方法与识别手语产生障碍和评估手语的第二语言习得有关。
A study was conducted to examine production variability in American Sign Language (ASL) in order to gain insight into the development of motor control in a language produced in another modality. Production variability was characterized through the spatiotemporal index (STI), which represents production stability in whole utterances and is a function of variability in effector displacement waveforms (Smith et al., 1995). Motion capture apparatus was used to acquire wrist displacement data across a set of eight target signs embedded in carrier phrases. The STI values of Deaf signers and hearing learners at three different ASL experience levels were compared to determine whether production stability varied as a function of time spent acquiring ASL. We hypothesized that lower production stability as indexed by the STI would be evident for beginning ASL learners, indicating greater production variability, with variability decreasing as ASL language experience increased. As predicted, Deaf signers showed significantly lower STI values than the hearing learners, suggesting that stability of production is indeed characteristic of increased ASL use. The linear trend across experience levels of hearing learners was not statistically significant in all spatial dimensions, indicating that improvement in production stability across relatively short time scales was weak. This novel approach to characterizing production stability in ASL utterances has relevance for the identification of sign production disorders and for assessing L2 acquisition of sign languages.
影响因子：
2.6
作者：
Kleinow, J;Smith, A
通讯作者：
Smith, A