Parafoveal previews and lexical frequency in natural reading: Evidence from eye movements and fixation-related potentials.
Parafoveal previews and lexical frequency in natural reading: Evidence from eye movements and fixation-related potentials.
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DOI：
10.1037/xge0000494
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发表时间：
2019-03
期刊：
影响因子：
--
通讯作者：
Liversedge SP
中科院分区：
文献类型：
--
作者：
Degno F;Loberg O;Zang C;Zhang M;Donnelly N;Liversedge SP
研究人员记录了受试者在阅读根据凝视-伴随边界范式显示的句子时的眼球运动和脑电图信号。每个句子中的两个目标词被操纵用于每个目标词的词频（高频与低频）和旁视预览（相同与随机字母串与X串）。眼动数据揭示了视觉旁视皮层对中央凹（PoF）的影响，以及中央凹视觉和正射预览效果和词频效果。固定相关电位（FRPs）显示视觉和正射PoF效应以及中央凹视觉和正射预览效应。我们的研究结果复制了X字符串预览条件下的早期预览积极性效应，并揭示了与预览相关的不同神经相关性，预览由一串随机字母相对于一串X组成。前一种效应似乎反映了与视旁和中央凹信息整合相关的困难，以及特征重叠，而后者反映了对潜在阅读处理的抑制和潜在中断。有趣的是，并一致的，没有频率效应反映在FRP措施。研究结果提供了深入了解的旁视加工和书面文字识别在阅读的神经相关性，并证明了利用生态有效的范式来研究建立良好的现象，发生的文本自然阅读的价值。
Participants’ eye movements and electroencephalogram (EEG) signal were recorded as they read sentences displayed according to the gaze-contingent boundary paradigm. Two target words in each sentence were manipulated for lexical frequency (high vs. low frequency) and parafoveal preview of each target word (identical vs. string of random letters vs. string of Xs). Eye movement data revealed visual parafoveal-on-foveal (PoF) effects, as well as foveal visual and orthographic preview effects and word frequency effects. Fixation-related potentials (FRPs) showed visual and orthographic PoF effects as well as foveal visual and orthographic preview effects. Our results replicated the early preview positivity effect in the X-string preview condition, and revealed different neural correlates associated with a preview comprised of a string of random letters relative to a string of Xs. The former effects seem likely to reflect difficulty associated with the integration of parafoveal and foveal information, as well as feature overlap, while the latter reflect inhibition, and potentially disruption, to processing underlying reading. Interestingly, and consistent with, no frequency effect was reflected in the FRP measures. The findings provide insight into the neural correlates of parafoveal processing and written word recognition in reading and demonstrate the value of utilizing ecologically valid paradigms to study well established phenomena that occur as text is read naturally.
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