Croot K, Patterson K, Hodges J R
MRC Applied Psychology Unit, Cambridge, United Kingdom.
Brain Lang. 1998 Feb 1;61(2):226-73. doi: 10.1006/brln.1997.1852.
We present an experiment investigation of the spoken single word production of two patients with nonfluent progressive aphasia. In Experiment 1, a task effect (reading > repetition > naming) suggested that phonological information available from task stimuli facilitated the patients' speech production; a length effect reflected the increased difficulty of phonological processing required for long words compared with that required for shorter words. Experiment 2 compared repetition, reading, copying, and writing to dictation tasks and demonstrated that a correspondence between input and output modality also facilitated performance. Experiment 3 showed that the patients' access to appropriate phonology in reading was positively related to the degree of correlation between orthographic and phonological forms. These results are discussed with reference to an account of pathologically weakened connections between nodes in an interactive spreading activation model of speech production of the type described by Dell (1986).
我们展示了一项针对两名非流利性进行性失语症患者口语单字产出的实验研究。在实验1中，一种任务效应（阅读>重复>命名）表明，任务刺激中可用的语音信息促进了患者的言语产出；一种长度效应反映了与短单词相比，长单词所需的语音处理难度增加。实验2比较了重复、阅读、抄写和听写任务中的书写情况，并证明输入和输出方式之间的对应关系也有助于提高表现。实验3表明，患者在阅读中获取适当语音的能力与正字法和语音形式之间的相关程度呈正相关。我们参照戴尔（1986年）描述的那种言语产出交互式扩散激活模型中各节点之间病理弱化连接的解释来讨论这些结果。
