Electrophysiological Evidence for Top-Down Lexical Influences on Early Speech Perception
Electrophysiological Evidence for Top-Down Lexical Influences on Early Speech Perception
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DOI：
10.1177/0956797619841813
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发表时间：
2019-06-01
影响因子：
8.2
通讯作者：
Toscano, Joseph C.
中科院分区：
文献类型：
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作者：
Getz, Laura M.;Toscano, Joseph C.
言语感知中一个尚未解决的问题是自上而下的语言信息是否会影响感知反应。我们解决了这个问题，使用事件相关电位技术在两个实验中，测量跨通道的顺序语义启动效应的听觉N1，声学线索编码的指数。参与者听到听觉目标（例如，“马铃薯”）跟随相关的视觉启动（例如，“MASHED”）、中性视觉启动（例如，“FACE”），或视觉掩模（例如，“”）。听觉目标开始于有声（/B/、/d/、/g/）或无声（/p/、/t/、/k/）的塞音，这种声学差异已知会产生N1振幅的差异。在实验1（N = 21）中，语义上下文调制的反应即将到来的目标，与语义关联较小的N1振幅。在实验2（N = 29）中，语义上下文改变了听者编码的声音：Ambibliographic语音起始时间编码类似的发声端点引起的语义联想。这些结果是一致的互动模型的口语识别，包括自上而下的影响早期的看法。
An unresolved issue in speech perception concerns whether top-down linguistic information influences perceptual responses. We addressed this issue using the event-related-potential technique in two experiments that measured cross-modal sequential-semantic priming effects on the auditory N1, an index of acoustic-cue encoding. Participants heard auditory targets (e.g., "potatoes") following associated visual primes (e.g., "MASHED"), neutral visual primes (e.g., "FACE"), or a visual mask (e.g., "XXXX"). Auditory targets began with voiced (/b/, /d/, /g/) or voiceless (/p/, /t/, /k/) stop consonants, an acoustic difference known to yield differences in N1 amplitude. In Experiment 1 (N = 21), semantic context modulated responses to upcoming targets, with smaller N1 amplitudes for semantic associates. In Experiment 2 (N = 29), semantic context changed how listeners encoded sounds: Ambiguous voice-onset times were encoded similarly to the voicing end point elicited by semantic associates. These results are consistent with an interactive model of spoken-word recognition that includes top-down effects on early perception.