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首页> 美国卫生研究院文献>Frontiers in Human Neuroscience >Visual and auditory synchronization deficits among dyslexic readers as compared to non-impaired readers: a cross-correlation algorithm analysis
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Visual and auditory synchronization deficits among dyslexic readers as compared to non-impaired readers: a cross-correlation algorithm analysis

机译：与没有阅读障碍的读者相比阅读障碍读者的视觉和听觉同步缺陷：互相关算法分析

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摘要

Visual and auditory temporal processing and crossmodal integration are crucial factors in the word decoding process. The speed of processing (SOP) gap (Asynchrony) between these two modalities, which has been suggested as related to the dyslexia phenomenon, is the focus of the current study. Nineteen dyslexic and 17 non-impaired University adult readers were given stimuli in a reaction time (RT) procedure where participants were asked to identify whether the stimulus type was only visual, only auditory or crossmodally integrated. Accuracy, RT, and Event Related Potential (ERP) measures were obtained for each of the three conditions. An algorithm to measure the contribution of the temporal SOP of each modality to the crossmodal integration in each group of participants was developed. Results obtained using this model for the analysis of the current study data, indicated that in the crossmodal integration condition the presence of the auditory modality at the pre-response time frame (between 170 and 240 ms after stimulus presentation), increased processing speed in the visual modality among the non-impaired readers, but not in the dyslexic group. The differences between the temporal SOP of the modalities among the dyslexics and the non-impaired readers give additional support to the theory that an asynchrony between the visual and auditory modalities is a cause of dyslexia.
机译：视觉和听觉时间处理以及跨模式整合是单词解码过程中的关键因素。这两种模式之间的处理速度（SOP）差距（Asynchrony），已被认为与阅读障碍现象有关，是当前研究的重点。在反应时间（RT）程序中，对19名阅读障碍者和17名未受损的大学成年读者进行了刺激，要求参与者确定刺激类型是仅视觉的，仅听觉的还是交叉模态的。对于这三个条件中的每一个，都获得了准确度，RT和事件相关电位（ERP）度量。开发了一种算法，用于测量每个模态的时间SOP对每组参与者的交叉模态积分的贡献。使用该模型对当前研究数据进行分析的结果表明，在交叉峰态整合条件下，在响应前的时间框架内（刺激呈现后170至240毫秒之间）存在听觉形态，从而提高了处理速度。非残障读者的视觉方式，但阅读障碍者则不然。阅读障碍者和非障碍阅读者之间的时态性SOP之间的差异进一步支持了视觉和听觉形态之间的不同步是阅读障碍的原因这一理论。

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