SPEECH AND LANGUAGE PROCESSING IN APHASIA

本研究的目的是探索语音和语言的加工 失语症的缺陷。演讲和语言方面的一些方面将是 调查包括言语产生和言语感知，词汇 访问和句子处理，其广泛目标是描述 失语症中语言缺陷的性质，并最终发展为 语言-大脑关系的模型。 在语音产生中，将对失语症语音进行声学分析 以确定前部失语症患者的生产缺陷(和 尤其是Broca的失语症)反映了 关节运动的协调，或者更具体地说，反映了 只有当两个独立的发音器是 牵涉其中。韦尼克言语产生的声学分析 还将进行失语症调查，以调查是否与 公认的学说，韦尼克的失语症表现出轻微的语音障碍 这在临床上并不明显，而且在性质上与 布罗卡氏失语症的语音障碍。在言语感知方面，一系列 使用合成语音连续体的感知实验，计算机编辑 将进行自然语音连续体和自然产生的样本 探讨失语症患者言语感知的程度 作为词汇加工需求的函数的缺陷。这些研究将 调查声学操控和音位变化的程度 因素影响词汇通达，反之，影响词汇通达的程度 通达会影响人们对语音维度的感知。使用 在词汇通达方面，将进行一系列词汇决定实验 进行的目的是调查涉及的加工缺陷的性质 词汇通达。这项研究的目标是确定 自动控制加工二分法在常态下的阐述 文学是对词汇缺陷的恰当描述 失语症和探索词汇通达系统在多大程度上 失语症患者对词项的意义和句法很敏感 这些词可能起到的作用。最后，实现了在线句子处理。 失语症将通过一系列听觉和跨模式词汇来探索 决策研究，以确定加工操作是否 对正常句子理解的贡献受到了影响。一批 显示出对法线上的在线加工要求敏感的尺寸 将从词法、句法和语义方面进行研究 约束条件。

It is the goal of this research to explore speech and language processing deficits in aphasia. A number of speech and language dimensions will be investigated including speech production and speech perception, lexical access, and sentence processing, with the broad goal of delineating the nature of language deficits in aphasia, and ultimately of developing a model of language-brain relations. In speech production, acoustic analysis of aphasic speech will be conducted to determine whether the production deficit of anterior aphasics (and particularly Broca's aphasics) reflects a global impairment in the coordination of articulatory movements or more specifically reflects an impairment in coordination only when tow independent articulators are involved. Acoustic analysis of the speech production of Wernicke's aphasics will also be conducted to investigate whether, contrary to accepted doctrine, Wernicke's aphasics display a subtle phonetic impairment that is not clinically evident and that is different in kind from the phonetic impairment of Broca's aphasics. In speech perception, a series of perception experiments using synthetic speech continua, computer-edited natural speech continua, and naturally produced exemplars will be conducted to explore the extent to which aphasic patients display speech perception deficits as a function of lexical processing demands. These studies will investigate the extent to which acoustic manipulations and phonological factors affect lexical access, and conversely, the extent to which lexical access affects the perception of the phonetic dimensions of speech. With respect to lexical access, a series of lexical decision experiments will be conducted to investigate the nature of the processing deficits involved in lexical access. It is the goal of this research to determine whether the automatic-controlled processing dichotomy elaborated in the normal literature is an appropriate characterization of lexical deficits in aphasia and to explore the extent to which the lexical access system of aphasics is sensitive to the meanings of lexical items and to the syntactic role that these words may play. Finally, on-line sentence processing in aphasia will be explored with a series of auditory and cross-modal lexical decision studies to determine whether the processing operations contributing to normal sentence comprehension are compromised. A number of dimensions shown to be sensitive to on-line processing demands in normals will be investigated including morphological, syntactic, and semantic constraints.