PDF(Pubmed)
Abstract：
The study aimed to investigate overt reading and naming processes in adult people with dyslexia (PDs) in shallow (transparent) language orthography. The results of adult PDs are compared with adult healthy controls HCs. Comparisons are made in three phases: pre-lexical (150-260 ms), lexical (280-700 ms), and post-lexical stage of processing (750-1000 ms) time window. Twelve PDs and HCs performed overt reading and naming tasks under EEG recording. The word reading and naming task consisted of sparse neighborhoods with closed phonemic onset (words/objects sharing the same onset). For the analysis of the mean ERP amplitude for pre-lexical, lexical, and post-lexical time window, a mixed design ANOVA was performed with the right (F4, FC2, FC6, C4, T8, CP2, CP6, P4) and left (F3, FC5, FC1, T7, C3, CP5, CP1, P7, P3) electrode sites, within-subject factors and group (PD vs. HC) as between-subject factor. Behavioral response latency results revealed significantly prolonged reading latency between HCs and PDs, while no difference was detected in naming response latency. ERP differences were found between PDs and HCs in the right hemisphere\'s pre-lexical time window (160-200 ms) for word reading aloud. For visual object naming aloud, ERP differences were found between PDs and HCs in the right hemisphere\'s post-lexical time window (900-1000 ms). The present study demonstrated different distributions of the electric field at the scalp in specific time windows between two groups in the right hemisphere in both word reading and visual object naming aloud, suggesting alternative processing strategies in adult PDs. These results indirectly support the view that adult PDs in shallow language orthography probably rely on the grapho-phonological route during overt word reading and have difficulties with phoneme and word retrieval during overt visual object naming in adulthood.
摘要：
该研究旨在调查浅层（透明）语言拼写法中阅读障碍（PD）的成年人的公开阅读和命名过程。将成人PD的结果与成人健康对照HC进行比较。在三个阶段进行比较：预词汇（150-260ms），词汇(280-700ms)，和处理的后词法阶段(750-1000ms)时间窗口。十二个PD和HC在EEG记录下执行了公开的读取和命名任务。单词阅读和命名任务由稀疏的邻域组成，这些邻域具有封闭的音素开始（单词/对象共享相同的开始）。为了分析词汇前的平均ERP振幅，词汇，和后词汇时间窗口，对右侧(F4、FC2、FC6、C4、T8、CP2、CP6、P4)和左侧(F3、FC5、FC1、T7、C3、CP5、CP1、P7、P3)电极位点进行混合设计方差分析。受试者内因素和群体(PD与HC)作为主体之间的因素。行为反应潜伏期结果显示，HC和PD之间的阅读潜伏期明显延长，而在命名响应延迟中未检测到差异。在右半球的词前时间窗口（160-200ms）中，在PD和HC之间发现了ERP差异，以大声朗读单词。对于视觉对象的大声命名，在右半球的词汇后时间窗口（900-1000ms）中，PD和HC之间存在ERP差异。本研究表明，在单词阅读和视觉对象大声命名中，右半球两组之间的特定时间窗口中头皮电场的分布不同，建议成人PD的替代加工策略。这些结果间接支持以下观点：浅层语言拼字法中的成人PD可能在公开单词阅读过程中依赖于图形语音路线，并且在成年后的公开视觉对象命名过程中难以进行音素和单词检索。
