Hakvoort Britt, van der Leij Aryan, Maurits Natasha, Maassen Ben, van Zuijen Titia L
Research Institute of Child Development and Education, Faculty of Social and Behavioral Sciences, University of Amsterdam, The Netherlands.
Research Institute of Child Development and Education, Faculty of Social and Behavioral Sciences, University of Amsterdam, The Netherlands.
Cortex. 2015 Feb;63:90-103. doi: 10.1016/j.cortex.2014.08.013. Epub 2014 Aug 28.
Less proficient basic auditory processing has been previously connected to dyslexia. However, it is unclear whether a low proficiency level is a correlate of having a familial risk for reading problems, or whether it causes dyslexia. In this study, children's processing of amplitude rise time (ART), intensity and frequency differences was measured with event-related potentials (ERPs). ERP components of interest are components reflective of auditory change detection; the mismatch negativity (MMN) and late discriminative negativity (LDN). All groups had an MMN to changes in ART and frequency, but not to intensity. Our results indicate that fluent readers at risk for dyslexia, poor readers at risk for dyslexia and fluent reading controls have an LDN to changes in ART and frequency, though the scalp activation of frequency processing was different for familial risk children. On intensity, only controls showed an LDN. Contrary to previous findings, our results suggest that neither ART nor frequency processing is related to reading fluency. Furthermore, our results imply that diminished sensitivity to changes in intensity and differential lateralization of frequency processing should be regarded as correlates of being at familial risk for dyslexia, that do not directly relate to reading fluency.
此前，基础听觉处理能力欠佳一直与诵读困难相关联。然而，目前尚不清楚较低的能力水平是存在阅读问题家族风险的一种关联因素，还是会导致诵读困难。在本研究中，通过事件相关电位（ERP）测量了儿童对振幅上升时间（ART）、强度和频率差异的处理情况。感兴趣的ERP成分是反映听觉变化检测的成分；失匹配负波（MMN）和晚期辨别负波（LDN）。所有组对ART和频率的变化都有MMN，但对强度的变化没有。我们的结果表明，有诵读困难风险的流利阅读者、有诵读困难风险的阅读能力差者和流利阅读对照组对ART和频率的变化都有LDN，尽管家族风险儿童在频率处理的头皮激活方面有所不同。在强度方面，只有对照组表现出LDN。与之前的研究结果相反，我们的结果表明，ART和频率处理都与阅读流畅性无关。此外，我们的结果意味着，对强度变化的敏感性降低以及频率处理的不同侧化应被视为存在诵读困难家族风险的关联因素，它们与阅读流畅性并无直接关联。
