Training improves reading speed in peripheral vision: Is it due to attention?
Training improves reading speed in peripheral vision: Is it due to attention?
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DOI：
10.1167/10.6.18
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发表时间：
2010-01-01
影响因子：
1.8
通讯作者：
Gefroh, Joshua J.
中科院分区：
文献类型：
--
作者：
Lee, Hye-Won;Kwon, MiYoung;Gefroh, Joshua J.
以前的研究表明，使用字母识别任务的外围视觉知觉训练可以提高阅读速度和字母识别(S.T.L.Chung，G.E.Legge，&S.H.Cheung，2004)。我们检验了这样一种假设，即增强对周边视觉的空间注意部署可以解释这种训练效果。受试者在注视前后进行了3项任务--RSVP阅读速度、三元字母识别(用于构建视觉广度轮廓)和空间注意力的分配(以词汇判断任务中目标位置的预线索的益处来衡量)。每组五名正常视力的年轻人接受了为期4天的上下视野或中央视觉的三元字母识别训练。对照组没有接受任何培训。我们对空间注意力分配的测量显示，视场各向异性；与其他三个象限相比，下视野比上视野更好地分配注意力，在右下象限比其他三个象限更好地分配注意力。所有受试者在后测中都表现出对周边视觉的空间注意部署的轻微改善，但这种改善与训练相关的阅读速度和视觉广度轮廓大小的增加无关。我们的结果表明，周边视觉空间注意的改善并不能解释周边视觉中阅读速度和字母识别的改善。
Previous research has shown that perceptual training in peripheral vision, using a letter-recognition task, increases reading speed and letter recognition (S. T. L. Chung, G. E. Legge, & S. H. Cheung, 2004). We tested the hypothesis that enhanced deployment of spatial attention to peripheral vision explains this training effect. Subjects were pre- and post-tested with 3 tasks at 10 degrees above and below fixation-RSVP reading speed, trigram letter recognition (used to construct visual-span profiles), and deployment of spatial attention (measured as the benefit of a pre- cue for target position in a lexical-decision task). Groups of five normally sighted young adults received 4 days of trigram letter-recognition training in upper or lower visual fields, or central vision. A control group received no training. Our measure of deployment of spatial attention revealed visual-field anisotropies; better deployment of attention in the lower field than the upper, and in the lower-right quadrant compared with the other three quadrants. All subject groups exhibited slight improvement in deployment of spatial attention to peripheral vision in the post-test, but this improvement was not correlated with training-related increases in reading speed and the size of visual-span profiles. Our results indicate that improved deployment of spatial attention to peripheral vision does not account for improved reading speed and letter recognition in peripheral vision.