Is word recognition different in central and peripheral vision?
Is word recognition different in central and peripheral vision?
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DOI：
10.1016/s0042-6989(03)00479-6
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发表时间：
2003-12-01
期刊：
影响因子：
1.8
通讯作者：
Ortiz, A
中科院分区：
文献类型：
--
作者：
Lee, HW;Legge, GE;Ortiz, A
周边视觉在正常阅读中起着重要的作用，但对于中心视野丧失的视障人士来说，其作用更大。本实验通过分析词频效应对词汇决策的影响，研究中央视觉和周边视觉的词汇加工是否存在差异。我们提出了两个主要问题：(1)中央视觉和周边视觉在词汇加工的时间过程中是否存在差异？(2)中央视觉和周边视觉在词汇加工质量上是否存在差异？为了解决第一个问题，我们在25到500毫秒的范围内检查了中央和周边视觉频率效应的时间过程。我们发现，中央视觉在25-50毫秒的最短曝光时间内出现显著的频率效应，而外围视觉直到100毫秒才出现显著的频率效应。为了解决第二个问题，我们使用词频效应作为词汇加工性质的标记。我们比较了准确度在匹配范围内（0-20%,20-40%,40-60%，60-80%和80-100%）的数据在中央和周边视觉中的频率效应。我们发现，在相同的表现水平下，中央视觉和周边视觉的频率效应模式没有差异。我们得出结论：周边视觉的词汇加工速度较慢，但中央视觉和周边视觉的词汇加工质量相似。(C) 2003 Elsevier Ltd.版权所有。
Peripheral vision plays an important role in normal reading, but its role becomes larger for visually impaired people with central-field loss. This experiment studied whether lexical processing differs in central and peripheral vision through the analysis of word-frequency effects in lexical decisions. We asked two main questions: (1) Do central and peripheral vision differ in the time course of lexical processing? and (2) do central and peripheral vision differ in the quality of lexical processing? To address the first question, we examined the time course of frequency effects in central and peripheral vision over a range from 25 to 500 ms. We found that significant frequency effects occurred for the shortest exposures, 25-50 ms, in central vision, whereas significant frequency effects did not occur in peripheral vision until 100 ms. To address the second question, we used word-frequency effects as a marker for the nature of lexical processing. We compared frequency effects in central and peripheral vision for data within matched ranges of percent accuracy (0-20%, 20-40%, 40-60%, 60-80%, and 80-100%). We found that there was no difference in the pattern of frequency effects in central and peripheral vision at equivalent performance levels. We conclude that lexical processing is slower in peripheral vision, but the quality of lexical processing is similar in central and peripheral vision. (C) 2003 Elsevier Ltd. All rights reserved.