Bilateral field advantage in visual enumeration.
Bilateral field advantage in visual enumeration.
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DOI：
10.1371/journal.pone.0017743
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发表时间：
2011-03-23
期刊：
影响因子：
3.7
通讯作者：
Humphreys GW
中科院分区：
文献类型：
--
作者：
Delvenne JF;Castronovo J;Demeyere N;Humphreys GW
最近的一些研究表明，当信息分布在左右视野时，其视觉处理能力比信息在单个半视野中呈现时要好（双侧视野优势）。这种效应被认为反映了两个半脑区独立的注意力资源，以及左右半脑区同时处理视觉信息的神经反应能力。在这里，我们研究了双侧视野优势是否也可以在需要两个半视野信息结合的高级视觉任务中观察到。为此，我们使用了一个视觉枚举任务——一个需要将单独的视觉项目同化为单个数量的任务——其中要枚举的项目要么呈现在一个半视场中，要么分布在两个视场之间。我们发现，列举大数量（少于4个）而不是小数量（少于4个）的视觉项目表现出双侧视野优势：当视觉项目在左右半视野中分开时，列举的准确性要高于所有视觉项目都在同一半视野中呈现时。对照实验进一步表明，这种效应不能归因于视野中物品的水平对齐优势，也不能归因于单侧和双侧显示之间的视网膜刺激差异。这些结果表明，当视觉任务涉及到半球间整合时，可能会出现双侧视野优势。这与先前的研究和理论一致，表明当视觉任务需要注意时，左右半脑区的神经反应并行处理可以扩大视觉信息的处理能力。
A number of recent studies have demonstrated superior visual processing when the information is distributed across the left and right visual fields than if the information is presented in a single hemifield (the bilateral field advantage). This effect is thought to reflect independent attentional resources in the two hemifields and the capacity of the neural responses to the left and right hemifields to process visual information in parallel. Here, we examined whether a bilateral field advantage can also be observed in a high-level visual task that requires the information from both hemifields to be combined. To this end, we used a visual enumeration task—a task that requires the assimilation of separate visual items into a single quantity—where the to-be-enumerated items were either presented in one hemifield or distributed between the two visual fields. We found that enumerating large number (>4 items), but not small number (<4 items), exhibited the bilateral field advantage: enumeration was more accurate when the visual items were split between the left and right hemifields than when they were all presented within the same hemifield. Control experiments further showed that this effect could not be attributed to a horizontal alignment advantage of the items in the visual field, or to a retinal stimulation difference between the unilateral and bilateral displays. These results suggest that a bilateral field advantage can arise when the visual task involves inter-hemispheric integration. This is in line with previous research and theory indicating that, when the visual task is attentionally demanding, parallel processing by the neural responses to the left and right hemifields can expand the capacity of visual information processing.
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影响因子：
2.3
作者：
Pasini, M;Tessari, A
通讯作者：
Tessari, A
影响因子：
1.8
作者：
Reardon, Kristin M.;Kelly, Jenna G.;Matthews, Nestor
通讯作者：
Matthews, Nestor
DOI：
10.1001/archneurpsyc.1958.02340090034004
发表时间：
1958-01-01
影响因子：
--
作者：
MYERS, RE;SPERRY, RW
通讯作者：
SPERRY, RW
影响因子：
1.7
作者：
ATKINSON, J;FRANCIS, MR;CAMPBELL, FW
通讯作者：
CAMPBELL, FW
DOI：
10.1037/0096-1523.7.5.1031
发表时间：
1981-01-01
影响因子：
2.1
作者：
FRIEDMAN, A;POLSON, MC
通讯作者：
POLSON, MC