Attention and spatial selection: Electrophysiological evidence for modulation by perceptual load
Attention and spatial selection: Electrophysiological evidence for modulation by perceptual load
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DOI：
10.3758/bf03212070
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发表时间：
2000-01-01
期刊：
影响因子：
--
通讯作者：
Mangun, GR
中科院分区：
文献类型：
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作者：
Handy, TC;Mangun, GR
行为数据表明，知觉负荷可以通过影响知觉水平加工阶段的注意资源分配来调节空间选择（Lavie & Tsal，1994）。为了直接检验这一假设，事件相关电位（ERP）记录低和高知觉负荷的目标在概率空间线索范式。三个实验的结果表明，由枕外侧P1和N1 ERP成分测量，在纹外视皮层的空间选择性加工的幅度增加知觉负荷。此外，这些影响空间选择被发现在P1在较低水平的知觉负荷比在N1。因此，ERP数据提供了直接的电生理支持的建议，链接感知负荷，在视觉处理的早期空间选择。然而，我们的研究结果提出了一个相对更广泛的模型-感知负荷只是调解早期选择的众多因素之一。
Behavioral data have suggested that perceptual load can modulate spatial selection by influencing the allocation of attentional resources at perceptual-level processing stages (Lavie & Tsal, 1994). To directly test this hypothesis, event-related potentials (ERPs) were recorded for both low- and high-perceptual-load targets in a probabilistic spatial cuing paradigm. The results from three experiments showed that, as measured by the lateral occipital P1 and N1 ERP components, the magnitude of spatially selective processing in extrastriate visual cortex increased with perceptual load. Furthermore, these effects on spatial selection were found in the P1 at lower levels of perceptual load than in the N1. The ERP data thus provide direct electrophysiological support for proposals that link perceptual load to early spatial selection in visual processing. However, our findings suggest a relatively broader model - where perceptual load is but one of many factors mediating early selection.