SPEECH AND LANGUAGE PROCESSING IN APHASIA

理解语言的本质是本研究的目的 失语症患者表现出的缺陷及其机制 对这样的赤字负有责任。我们将专注于潜在的加工 影响对语法的特定组成部分的使用的障碍。在……里面 我们将调查Broca的失语症患者是否有 语音障碍影响两个独立发音者的发音时间 语音分段属性的实现。我们将探索 口腔闭合松解的时序关系 鼻辅音的产生与擦音的时序参数 发声过程中与声门振动有关的噪声 摩擦辅音。以确定亚临床语音是否 韦尼克失语症的损害反映了脑损伤的全球影响， 我们将对多个时间维度进行声学分析 非失语症右脑患者辅音和元音的产生。 在词汇通达和词汇加工方面，我们将考察 Broca‘s和I-WerNicke失语症表现为加工二分法 在快速获取语言信息和使用注意之间 获取语言信息的资源和策略。我们将探索 失语症患者使用部分语义信息的能力 预测性启发式，他们招募注意力资源的能力 在词汇通达中，以及词汇通达受以下因素限制的程度 信息来源多种多样。在句法处理方面，我们将探索 失语症中潜在的句法加工缺陷并调查 失语症患者的语法缺陷反映了加工障碍 构建句法表示法。我们将研究如何处理 通过考察包含关系句的填空依赖关系 带和不带显性关系的动词宾语从句 在一系列实验中，我们将研究是否 失语者将正确的先行词分配给回指。我们的研究 语音产生的策略是进行声学分析来推断 声道手势能产生特定的声学模式。在 在词汇和句法加工的实验中，我们使用了听觉和视觉 词汇决策任务考察在线加工。

It is the goal of this research to understand the nature of the language deficits displayed by aphasic patients and to characterize the mechanisms responsible for such deficits. We will focus on potential processing impairments affecting access to particular components of the grammar. In speech production, we will investigate whether Broca's aphasics have a phonetic disorder affecting the timing of two independent articulators in the implementation of the segmental properties of speech. We will explore the timing relation between the release of the oral closure in the production of nasal consonants and the timing parameters of the fricative noise in relation to glottal vibrationin the production of voicing in fricative consonants. To determine whether the subclinical phonetic impairment of Wernicke's aphasics reflects global effects of brain-damage, we will conduct an acoustic analysis of a number of temporal dimensions of consonant and vowel production in non-aphasic right hemisphere patients. In lexical access and lexical processing, we will investigate whether Broca's and i Wernicke's aphasics demonstrate a processing dichotomy between rapidly accessing linguistic information and using attentional resources and strategies to access linguistic information. We will explore aphasic patients' ability to use knowledge of semantic information as part of a predictive heuristic, their ability to recruit attentional resources in lexical access, and the extent to which lexical access is constrained by multiple sources of information. In syntactic processing, we will explore potential syntactic processing deficits in aphasia and investigate whether the grammatical deficits of aphasic patients reflect processing deficits in building syntactic representations. We will study the processing of filler-gap dependencies by investigating sentences containing relative clauses as object of the verb both with and without the overt relative clause marker, and in a series of experiments, we will investigate if aphasics assign the correct antecedent to an anaphor. Our research strategy in speech production is to conduct acoustic analyses to infer the vocal tract gestures giving rise to particular acoustic patterns. In the experiments on lexical and syntactic processing, we use auditory and visual lexical decision tasks to investigate on-line processing.