两个经典的实验范式——掩蔽重复启动和边界范式——在理解视觉单词识别过程中发挥了关键作用。传统上,这些范式已被不同的研究人员社区采用,有着自己悠久的研究传统。然而,对文献的回顾表明,与两种范式建立的文字处理的脑电相关可能显示出有趣的相似性,特别是在位置方面,定时,以及N1和N250效应的方向。然而,到目前为止,这两种范式之间没有进行直接比较。在目前的研究中,我们使用组合的眼动追踪/脑电图,使用相同的材料(单个汉字)作为刺激进行这种受试者内比较.为了便于直接比较,我们使用了简化版本的边界范式-单词边界范式。我们的结果显示了N1和N250对两种范例的典型早期重复效应。然而,N250中的重复效应(即,与不同单词的素数/预览相比,相同单词的素数/预览后的消极性降低)在单个单词边界范式下比在蒙面启动下更大。对于N1效应,两种范式的重复效应相似,与交替相比,重复后显示更大的N1。因此,结果表明,在神经水平,一个简短的呈现和蒙面的中央凹主要产生质量上类似的促进效果,在视觉单词识别作为一个旁凹预览在一个单一的扫视前,尽管在后一种情况下,这种影响似乎更强。
Two classic experimental paradigms - masked repetition priming and the boundary paradigm - have played a pivotal role in understanding the process of visual word recognition. Traditionally, these paradigms have been employed by different communities of researchers, with their own long-standing research traditions. Nevertheless, a review of the literature suggests that the brain-electric correlates of word processing established with both paradigms may show interesting similarities, in particular with regard to the location, timing, and direction of N1 and
N250 effects. However, as of yet, no direct comparison has been undertaken between the two paradigms. In the current study, we used combined eye-tracking/EEG to perform such a within-subject comparison using the same materials (single Chinese characters) as stimuli. To facilitate direct comparisons, we used a simplified version of the boundary paradigm - the single word boundary paradigm. Our results show the typical early repetition effects of N1 and
N250 for both paradigms. However, repetition effects in
N250 (i.e., a reduced negativity following identical-word primes/previews as compared to different-word primes/previews) were larger with the single word boundary paradigm than with masked priming. For N1 effects, repetition effects were similar across the two paradigms, showing a larger N1 after repetitions as compared to alternations. Therefore, the results indicate that at the neural level, a briefly presented and masked foveal prime produces qualitatively similar facilitatory effects on visual word recognition as a parafoveal preview before a single saccade, although such effects appear to be stronger in the latter case.