SPEECH AND LANGUAGE PROCESSING IN APHASIA

描述(改编自调查者摘要)：本报告的目标 研究是为了了解语言缺陷的本质 对失语症患者进行研究，并确定导致他们失语症的机制。 这项研究的重点是在线加工障碍。两个演讲 本课程将研究语音的产生和感知。之间的接口 语音感知、词汇通达和句法处理也将 被调查。言语产生研究将探索前脑 失语症患者在两个独立的时间上有障碍 发音器，研究鼻音发音方式和时机 口腔闭合松解与降膜的关系。至 确定是否保留语音的其他属性、频谱 鼻辅音附近发音部位的特点 对鼻腔释放的影响进行了研究。失语症患者能否实施 在更大的语境中，语音参数的影响 摩擦音发音模式的回归同化 辅音将被调查。在言语产出研究中， 声学分析将调查声道手势 特殊的声学模式。在语音感知方面，一种新的方法将 用于研究患者对时间、光谱和幅度的感知 参数。这些参数将使用计算机编辑来研究 自然语音或通过语音合成，受试者使用反应 在辨别任务中乘以测量值。进一步的研究将 调查语音的声学/语音变体在多大程度上 类别会影响单词识别。听觉重复启动 将使用范例，以及词汇决定范例。最后， 使用词汇判断任务，研究人员将进行一系列 在线实验评估失语症个体是否分配了 把先行词改正为回指。

DESCRIPTION (Adapted from the Investigator's Abstract): The goal of this research is to understand the nature of language deficits displayed by aphasic patients and to characterize the mechanisms responsible for them. The research focuses on on-line processing impairments. Both speech production and speech perception will be studied. The interface between speech perception and lexical access and syntactic processing also will be investigated. Speech production studies will explore whether anterior aphasic patients have impairments in the timing of two independent articulators, studying the nasal manner of articulation and the timing relation between release of oral closure and lowering the velum. To determine whether other properties of speech are spared, spectral properties of place of articulation for nasal consonants in the vicinity of nasal release, are studied. Whether aphasic patients can implement phonetic parameters of speech in larger contexts, the effects of regressive assimilation on phonetic patterns of voicing in fricative consonants will be investigated. In the speech production studies, acoustic analyses will investigate the vocal tract gestures for particular acoustic patterns. In speech perception, a new method will be used to study patients perceptions of temporal, spectral and amplitude parameters. These parameters will be studied using computer editing of natural speech or via speech synthesis, with subjects using reaction times measurements in a discrimination task. Further studies will investigate the extent to which acoustic/ phonetic variants of a phonetic category affect word recognition. An auditory repetition priming paradigm will be used, as well as a lexical decision paradigm. Finally, using lexical decision tasks, the investigators will conduct a series of on-line experiments to assess whether aphasic individuals assign the correct antecedent to an anaphor.