Neural evidence for lexical parafoveal processing.

Neural evidence for lexical parafoveal processing.
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词汇parafoveal加工的神经证据。

DOI:
10.1038/s41467-021-25571-x
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发表时间:
2021-09-02
影响因子:
16.6
通讯作者:
Jensen O
Jensen O
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Pan Y;Frisson S;Jensen O

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尽管视力下降,中央凹旁信息在自然阅读中起着重要作用。然而,不同的阅读模型在词汇水平上是否对单词进行准中心预习的问题上存在分歧。我们通过结合快速不可见频率标记(RIFT)方法与脑磁图(MEG)和眼动追踪来发现词汇旁中央凹加工的神经证据。在默读任务中,目标单词被下意识地以60赫兹的频率标记(闪烁)。注视前目标词时的标记反应反映了目标词的旁中央凹加工。我们观察到,与高词汇频率目标相比,低词汇频率目标在前目标注视期间的标记反应更强。此外,这种词汇旁中央凹处理与个人阅读速度有关。我们的研究结果表明,阅读在中央凹和副中央凹同时展开,以支持流畅的阅读。在阅读时,我们会先提取即将出现的单词的信息,然后再进行扫视。在这里,作者利用脑磁图数据提供了支持这种预览过程的神经机制,并展示了预览效果与阅读速度之间的关联。
In spite of the reduced visual acuity, parafoveal information plays an important role in natural reading. However, competing models on reading disagree on whether words are previewed parafoveally at the lexical level. We find neural evidence for lexical parafoveal processing by combining a rapid invisible frequency tagging (RIFT) approach with magnetoencephalography (MEG) and eye-tracking. In a silent reading task, target words are tagged (flickered) subliminally at 60 Hz. The tagging responses measured when fixating on the pre-target word reflect parafoveal processing of the target word. We observe stronger tagging responses during pre-target fixations when followed by low compared with high lexical frequency targets. Moreover, this lexical parafoveal processing is associated with individual reading speed. Our findings suggest that reading unfolds in the fovea and parafovea simultaneously to support fluent reading. When reading, we extract information about upcoming words before we saccade to them. Here the authors provide insights on the neural mechanisms supporting this previewing process using MEG data, and show an association between previewing effects and reading speed.
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