Drouin Julia R, Theodore Rachel M, Myers Emily B
Department of Speech, Language, and Hearing Sciences, University of Connecticut, 850 Bolton Road, Storrs, Connecticut 06269, USA
J Acoust Soc Am. 2016 Oct;140(4):EL307. doi: 10.1121/1.4964468.
Listeners use lexical information to retune the mapping between the acoustic signal and speech sound representations, resulting in changes to phonetic category boundaries. Other research shows that phonetic categories have a rich internal structure; within-category variation is represented in a graded fashion. The current work examined whether lexically informed perceptual learning promotes a comprehensive reorganization of internal category structure. The results showed a reorganization of internal structure for one but not both of the examined categories, which may reflect an attenuation of learning for distributions with extensive category overlap. This finding points towards potential input-driven constraints on lexically guided phonetic retuning.
听众利用词汇信息重新调整声学信号与语音表征之间的映射，从而导致语音类别边界发生变化。其他研究表明，语音类别具有丰富的内部结构；类别内的变异以渐变的方式呈现。当前的研究考察了词汇引导的知觉学习是否会促进内部类别结构的全面重组。结果显示，在所考察的两个类别中，只有一个类别发生了内部结构的重组，这可能反映了对于具有广泛类别重叠的分布，学习效果有所减弱。这一发现指向了词汇引导的语音重新调整可能存在潜在的输入驱动限制。
