Sublexical properties of spoken words modulate activity in Broca's area but not superior temporal cortex: implications for models of speech recognition.
Sublexical properties of spoken words modulate activity in Broca's area but not superior temporal cortex: implications for models of speech recognition.
复制标题
口语单词的词汇下特性调节布罗卡区的活动，但不调节上颞叶皮层的活动：对语音识别模型的影响。
DOI：
10.1162/jocn.2011.21620
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发表时间：
2011
影响因子：
3.2
通讯作者：
Hickok,Gregory
中科院分区：
文献类型：
--
作者：
VadenJr,KennethI;Piquado,Tepring;Hickok,Gregory
口语单词识别的许多模型都认为声学流被解析成音素级单元，音素级单元又激活更大的表示[McClelland，J.L.，& Elman，J. L.言语感知的TRACE模型。认知心理学，18，1 - 86，1986]，而其他人认为，更大的分析单元被激活而不需要分段中介[Greenberg，S.理解口语的多层理论框架。in s. Greenberg & W. a. Ainsworth（编辑），听演讲：一个听觉的角度（页。411 - 433）。Mahwah，NJ：Erlbaum，2005; Klatt，D. H.言语知觉：声学语音分析和词汇通达的模型。语音学杂志，7，279 - 312，1979; W.听觉知觉中的前知觉图像、加工时间和知觉单位。《心理学评论》，79，124 - 145，1972]。识别大脑对语音的反应中的分段效应可能会回答这个问题。例如，如果这种影响局限于听觉皮层中相对早期的处理阶段，这将支持语音识别模型，其中分段单元被明确解析出来。相反，发生在听觉皮层外的分段过程可能表明应考虑替代模型。目前的fMRI实验操纵的phonotactic频率（PF）的单词，被归类于短名单，而参与者进行了伪词检测任务。PF被认为是调制网络中的音素级单位表示。本实验确定的活动在左额下回，正相关与PF。没有发现PF的影响，在颞叶区域。我们建议，观察到的语音听的影响，反映了强度的声学语音模式和发音语音代码之间的关联，涉及音素水平单位。在现有的病变证据的基础上，我们解释的功能，这种神经运动协会发挥的作用，主要是在生产。这些发现是一致的，认为音素级单位不一定访问语音识别过程中。
Many models of spoken word recognition posit that the acoustic stream is parsed into phoneme level units, which in turn activate larger representations [McClelland, J. L., & Elman, J. L. The TRACE model of speech perception.Cognitive Psychology, 18,1–86, 1986], whereas others suggest that larger units of analysis are activated without the need for segmental mediation [Greenberg, S. A multitier theoretical framework for understanding spoken language. In S. Greenberg & W. A. Ainsworth (Eds.),Listening to speech: An auditory perspective(pp. 411–433). Mahwah, NJ: Erlbaum, 2005; Klatt, D. H. Speech perception: A model of acoustic-phonetic analysis and lexical access.Journal of Phonetics, 7,279–312, 1979; Massaro, D. W. Preperceptual images, processing time, and perceptual units in auditory perception.Psychological Review, 79,124–145, 1972]. Identifying segmental effects in the brain's response to speech may speak to this question. For example, if such effects were localized to relatively early processing stages in auditory cortex, this would support a model of speech recognition in which segmental units are explicitly parsed out. In contrast, segmental processes that occur outside auditory cortex may indicate that alternative models should be considered. The current fMRI experiment manipulated the phonotactic frequency (PF) of words that were auditorily presented in short lists while participants performed a pseudoword detection task. PF is thought to modulate networks in which phoneme level units are represented. The present experiment identified activity in the left inferior frontal gyrus that was positively correlated with PF. No effects of PF were found in temporal lobe regions. We propose that the observed phonotactic effects during speech listening reflect the strength of the association between acoustic speech patterns and articulatory speech codes involving phoneme level units. On the basis of existing lesion evidence, we interpret the function of this auditory–motor association as playing a role primarily in production. These findings are consistent with the view that phoneme level units are not necessarily accessed during speech recognition.