摘要
利用功能性磁共振成像(fMRI)技术探讨文盲和非文盲汉字字形和语音加工脑机制的差异。实验1使用汉字字形和图形比较了中国人文盲和非文盲字形加工过程脑机制的左侧差异。实验2使用汉字语音和纯音比较了文盲和非文盲语音加工过程脑机制的双侧差异。结果表明文盲与非文盲汉字字形和语音加工脑机制不同,且非文盲的脑活动强。
Chinese is a logographic language system that differs from alphabetic languages, and some of the neurocognitive mechanisms underlying Chinese logographic reading also differ from those underlying alphabetic word reading （ Tan, 2000, 2001 ）. Previous studies that have compared performance between alphabetic/iterate and illiterate subjects indicate that the literates surpass the illiterates especially in tasks involving phonological processing and that the different activation regions in fMRI are located between Broca＇s area and the inferior parietal cortex as well as the posterior - midinsula bridge between Wernicke＇s and Broca＇s area. Few such studies were about Chinese -speaking individuals except one which showed different activation patterns between Chinese illiterates and literates in silent word recognition tasks （the left inferior/middle frontal gyrusand bilateral superior temporal gyri） and in silent picture - naming tasks （ the bilateral inferior/middle fontalgyri and left limbic cingulated gyms）. Our recent studies （ Wu, 2007 ; Cai, 2007 ） have found func- tional segregation in the left inferior frontal gyms, in which the dorsal regions are related to automatic access to an articulatory represen- tation at the syllable or phoneme level, and the ventral parts are related to lexical or semantic processing. However, it is still unknown whether education level effects the neural activation associated with the processing of Chinese. In this study, we used functional magnetic resonance imaging （fMRI） to investigate the effects of education level on brain activa- tion related to Chinese character font size and phonological processing of Chinese. Specifically, we designed two fMRI experiments with illiterate and literate subjects to assess the issue. In experiment 1, thirteen literate and thirteen illiterate subjects participatedin the visu- al Chinese characters and simple figures discrimination tasks. Subjects were asked to view the character or figure pairs and discriminate whether
出处
《心理科学》
CSSCI
CSCD
北大核心
2013年第6期1408-1412,共5页
Journal of Psychological Science
关键词
文盲
非文盲
汉字字形
语音
功能性磁共振成像
illiterate, literate, Chinese character font size, phonological, fMRI
