汉语发展性阅读障碍小学生言语工作记忆功能状况

Phonological loop function in developmental dyslexia:A study with Chinese children

目的探讨汉语发展性阅读障碍儿童与正常儿童在言语工作记忆功能上的差异,为相应干预治疗措施的制定提供参考依据。方法从武汉市某小学筛选出30名汉语阅读障碍小学生为阅读障碍组,以同性别、同年级的正常小学生30名为阅读正常组,采用视觉押韵方式,设定非启动和启动语音复述系统,比较两组儿童2种任务的反应时和错误率。结果在启动语音复述系统的任务中,阅读障碍组儿童反应时和错误率均明显高于阅读正常组儿童,差异均有统计学意义(P值均<0.05)。阅读障碍组儿童启动语音复述系统任务的错误率和反应时与非启动任务比较,差异均无统计学意义(P值均>0.05)。结论阅读障碍儿童言语工作记忆的语音复述子系统存在缺陷,有针对性的训练可提高阅读障碍儿童干预治疗效果。

Objective To explore phonological loop function in Chinese developmental dyslexic children. Methods Dyslexic children and control group were matched for gender and age. All subjects were assessed by rhyming paradigm. The articulatory unrehearsal component task and articulatory rehearsal component task were used to phonological loop function measure and their reaction time （RT） , error rate （ ER） were analyzed. Resuits The RT and ER of dyslexic children was significantly higher（ P〈0.05 ） in articulatory rehearsal component task compared to the normal readers. No significant difference on the ER of dyslexic children in the two tasks（ P〉0.05 ） and the RT of dyslexic children was marginal significantly higher in articulatory rehearsal component task than that in articulatory unrehearsal component task （ P〉0.05 ）. Condnsion Children with developmental dyslexia showed deficits in articulatory rehearsal component of the phonological loop. Some target rehearsal can effectively improve the treatment effects.