Weiss Yael, Booth James R
Department of Psychology, University of Texas at Austin, Austin, TX 78712, USA.
Department of Psychology and Human Development, Vanderbilt University, Nashville, TN 37203, USA.
Brain Lang. 2017 Dec;175:64-70. doi: 10.1016/j.bandl.2017.09.006. Epub 2017 Oct 8.
The comparison of words and pseudowords has been extensively used in adult neuroimaging studies to inform neurocognitive models of reading but has rarely been used to inform models of reading acquisition. Using a rhyming judgment task, the current study examined age-related differences in the spelling to sound mapping mechanisms involved in word and pseudoword reading. We hypothesized a developmental increase in specialization of the brain mechanisms engaged for word and pseudoword processing. Consistent with adult studies, children in the current study demonstrated a greater activation for words as compared to pseudowords in the anterior left ventral occipito-temporal cortex (vOT). Inconsistent with adult studies, children also showed greater activation for words as compared to pseudowords in the mid-posterior left vOT, indicating a robust semantic influence on orthographic processing in young readers. Furthermore, our results did not indicate a lexicality by age interaction for 8- to 13-year-old children, suggesting that the adult-like specialization in the left vOT only appears later in development.
在成人神经影像学研究中，单词与假词的比较已被广泛用于为阅读的神经认知模型提供信息，但很少被用于为阅读习得模型提供信息。本研究使用押韵判断任务，考察了单词和假词阅读中涉及的拼写-发音映射机制的年龄相关差异。我们假设，参与单词和假词加工的大脑机制的专业化程度会随着发育而提高。与成人研究一致，本研究中的儿童在左前腹侧枕颞叶皮层（vOT）中，与假词相比，对单词表现出更大的激活。与成人研究不一致的是，儿童在左vOT中后部，与假词相比，对单词也表现出更大的激活，这表明语义对年轻读者的正字法加工有强烈影响。此外，我们的结果并未表明8至13岁儿童存在词汇性与年龄的交互作用，这表明左vOT中类似成人的专业化仅在发育后期出现。
