Abstract: 【Objective】 To explore visual-spatial sketch Pad function in Chinese developmental dyslexic children. To study the correlation between visual-spatial working memory of subjects and language cognition. 【Methods】 Dyslexic children were chosen according to the International Classification of Diseases-10(ICD-10), and control group was matched for gender, age. All subjects were assessed by written vocabulary skills, phonological processing skills and orthographic skills. Visual matrix span task and Corsi span task were used to measure visual-spatial working memory. 【Results】 The scores of dyslexic children on language cognition were significantly lower on the normal readers(P<0.05). The scores of dyslexic children on Visual matrix span task scores and Corsi span task were significantly lower on the normal readers(P<0.05). There were significant statistically correlation coefficients between the scores of Visual matrix span task scores and Corsi span task and the scores of written vocabulary skills and orthographic skills. There were no significant statistically correlation coefficients with phonological processing skills(P＞0. 05). 【Conclusions】 Children with developmental dyslexia show deficits in visual-spatial working memory ability. There are significant correlations between visual-spatial working memory and their written vocabulary skills and orthographic skills.

Key words: developmental dyslexia of Chinese, visual-spatial working memory, language congnition

摘要： 【目的】 研究汉语阅读障碍儿童在视空间工作记忆与正常儿童的差异,探讨视空间工作记忆与基本语言认知的相关性。 【方法】 按照ICD-10中阅读困难的诊断标准, 从武汉某小学筛选出25名汉语阅读障碍儿童为实验组, 并从同性别、同年级的正常儿童中选择正常对照33人。对两组儿童进行识字量、语音意识、正字法等基本语言认知测试,同时采用视空间工作记忆的研究范式-视觉矩阵和Corsi广度,考察两组儿童在视觉工作记忆和空间工作记忆任务上的表现。 【结果】 语言认知测试,阅读障碍组儿童得分均明显低于正常儿童组(P值均<0.05)。阅读障碍组儿童视觉矩阵得分和Corsi广度得分明显低于正常对照组儿童,差异均具有统计学意义(P值均<0.05)。视觉矩阵得分和Corsi广度得分均与儿童识字量、正字法意识测试呈正相关(P值均< 0.05),但与语音意识测试均无显著相关性(P值均＞0.05)。 【结论】 阅读障碍儿童的视空间工作记忆存在缺陷,视空间工作记忆与儿童识字量、正字法意识存在一定相关性。

关键词: 汉语发展性阅读障碍, 视空间工作记忆, 语言认知