Neural Mechanisms of Human Perceptual Choice Under Focused and Divided Attention
Neural Mechanisms of Human Perceptual Choice Under Focused and Divided Attention
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集中注意力和分散注意力下人类感知选择的神经机制
DOI：
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发表时间：
2015
影响因子：
5.3
通讯作者：
C. Summerfield
中科院分区：
文献类型：
--
作者：
V. Wyart;N. Myers;C. Summerfield
感知决策发生在瞬间感觉输入的评估和整合之后，在空间上不同的信息源之间分散注意力会损害决策绩效。然而，目前尚不清楚的是，分散注意力是否会降低感官信号的精度，妨碍它们转化为决策信号，或抑制决策信息的整合，以形成适当的反应。在这里，我们记录了人类脑电图（EEG）活动，而参与者根据他们的平均倾斜度将两个同时和独立的视觉光栅流中的一个分类。通过分析脑电活动与每个样本提供的信息之间的逐试验相关性，我们得到了行为和神经学上的一致证据，即在左右视野之间划分注意力不会抑制感觉或决策信息的编码。在分散注意力的情况下，来自两种视觉流的瞬间决策信息被编码为缓慢的顶叶信号而不受干扰，但在其整合过程中在下游丢失，反映在运动mu和β波段（10-30 Hz）信号中，导致“泄漏”积累过程，对更近期的样本产生更大的行为影响。相比之下，被明确暗示为不相关的感官输入没有转化为决策信号。这些发现表明，信息整合的后期认知瓶颈限制了分散注意下的决策绩效，并对认知负荷下的信息整合决策理论模型提出了新的能力约束。
Perceptual decisions occur after the evaluation and integration of momentary sensory inputs, and dividing attention between spatially disparate sources of information impairs decision performance. However, it remains unknown whether dividing attention degrades the precision of sensory signals, precludes their conversion into decision signals, or dampens the integration of decision information toward an appropriate response. Here we recorded human electroencephalographic (EEG) activity while participants categorized one of two simultaneous and independent streams of visual gratings according to their average tilt. By analyzing trial-by-trial correlations between EEG activity and the information offered by each sample, we obtained converging behavioral and neural evidence that dividing attention between left and right visual fields does not dampen the encoding of sensory or decision information. Under divided attention, momentary decision information from both visual streams was encoded in slow parietal signals without interference but was lost downstream during their integration as reflected in motor mu- and beta-band (10–30 Hz) signals, resulting in a “leaky” accumulation process that conferred greater behavioral influence to more recent samples. By contrast, sensory inputs that were explicitly cued as irrelevant were not converted into decision signals. These findings reveal that a late cognitive bottleneck on information integration limits decision performance under divided attention, and places new capacity constraints on decision-theoretic models of information integration under cognitive load.
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比较分类模型。
DOI：
10.1037/0096-3445.133.1.63
发表时间：
2004
期刊：
Journal of experimental psychology. General
影响因子：
--
作者：
Rouder,JeffreyN;Ratcliff,Roger
通讯作者：
Ratcliff,Roger
影响因子：
5.4
作者：
M. Usher;James L. McClelland
通讯作者：
M. Usher;James L. McClelland
DOI：
10.1037/0096-1523.20.4.887
发表时间：
1994-08-01
影响因子：
2.1
作者：
LUCK, SJ;HILLYARD, SA;HAWKINS, HL
通讯作者：
HAWKINS, HL
影响因子：
3.7
作者：
Di Russo, F;Martínez, A;Hillyard, SA
通讯作者：
Hillyard, SA
DOI：
--
发表时间：
1987
期刊：
Electroencephalography and clinical neurophysiology. Supplement
影响因子：
--
作者：
S. Hillyard;G. Mangun
通讯作者：
S. Hillyard;G. Mangun