Neural substrates of subphonemic variation and lexical competition in spoken word recognition.
Neural substrates of subphonemic variation and lexical competition in spoken word recognition.
复制标题
口语单词识别中亚音位变异和词汇竞争的神经基质。
DOI：
10.1080/23273798.2018.1531140
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Myers,EmilyB
中科院分区：
文献类型：
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作者：
Luthra,Sahil;Guediche,Sara;Blumstein,SheilaE;Myers,EmilyB
在口语单词识别中，亚音素变化影响词汇激活，在类别边界附近的声音增加语音竞争以及词汇竞争。目前的研究调查了这些因素的相互作用，使用视觉世界任务，其中参与者被指示看一张图片的听觉目标（例如孔雀）。眼动数据表明，当一个有声的开始竞争对手（如烧杯）也显示时，参与者会减慢，当声学语音竞争增加时，这种效果会被放大。同时收集的功能磁共振成像数据显示，多个大脑区域对开始竞争者的存在敏感，包括缘上回、颞中回和额下回，功能连接分析显示，左额叶区域的协调活动取决于声学语音和词汇因素。两者合计，结果表明，额叶脑结构在解决词汇竞争的作用，特别是作为非典型的声学语音信息映射到词汇。
In spoken word recognition, subphonemic variation influences lexical activation, with sounds near a category boundary increasing phonetic competition as well as lexical competition. The current study investigated the interplay of these factors using a visual world task in which participants were instructed to look at a picture of an auditory target (e.g.peacock). Eyetracking data indicated that participants were slowed when a voiced onset competitor (e.g.beaker) was also displayed, and this effect was amplified when acoustic-phonetic competition was increased. Simultaneously-collected fMRI data showed that several brain regions were sensitive to the presence of the onset competitor, including the supramarginal, middle temporal, and inferior frontal gyri, and functional connectivity analyses revealed that the coordinated activity of left frontal regions depends on both acoustic-phonetic and lexical factors. Taken together, results suggest a role for frontal brain structures in resolving lexical competition, particularly as atypical acoustic-phonetic information maps on to the lexicon.