The temporal dynamics of ambiguity resolution: Evidence from spoken-word recognition
The temporal dynamics of ambiguity resolution: Evidence from spoken-word recognition
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DOI：
10.1016/j.jml.2007.01.001
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发表时间：
2007-11-01
影响因子：
4.3
通讯作者：
Gaskell, M. Gareth
中科院分区：
文献类型：
--
作者：
Dahan, Delphine;Gaskell, M. Gareth
两个实验研究了口语词识别中词汇激活的动态变化。在这两个实验中，关键材料都是成对的词头匹配的、频率不同的可图示名词。显示与这些单词相关的图片，以及两张干扰物图片。门控任务，其中参与者确定的图片与逐渐延长的片段的口语单词，检查这些对语音波形中的歧视线索的可用性。参与者对简短、模糊的片段的反应存在明显的频率偏差，随后是一个时间窗口，在这个时间窗口中，区分信息逐渐变得可用。一项视觉世界实验研究了言语相关的眼球运动。固定分析表明，频率的影响词汇竞争远远超出了点的语音信号，在该点的口语单词已完全区别于它的竞争对手（如确定使用门控）。两者合计，这些数据支持的模型，其中词汇激活的处理动态是识别速度的限制因素，超过和以上的语音信号的时间展开。(c)2007年爱思唯尔公司All rights reserved.
Two experiments examined the dynamics of lexical activation in spoken-word recognition. In both, the key materials were pairs of onset-matched picturable nouns varying in frequency. Pictures associated with these words, plus two distractor pictures were displayed. A gating task, in which participants identified the picture associated with gradually lengthening fragments of spoken words, examined the availability of discriminating cues in the speech waveforms for these pairs. There was a clear frequency bias in participants' responses to short, ambiguous fragments, followed by a temporal window in which discriminating information gradually became available. A visual-world experiment examined speech contingent eye movements. Fixation analyses suggested that frequency influences lexical competition well beyond the point in the speech signal at which the spoken word has been fully discriminated from its competitor (as identified using gating). Taken together, these data support models in which the processing dynamics of lexical activation are a limiting factor on recognition speed, over and above the temporal unfolding of the speech signal. (c) 2007 Elsevier Inc. All rights reserved.