Isoluminant stimuli and red background attenuate the effects of transient spatial attention on temporal resolution
Isoluminant stimuli and red background attenuate the effects of transient spatial attention on temporal resolution
复制标题
等亮度刺激和红色背景减弱瞬时空间注意力对时间分辨率的影响
DOI：
10.1016/j.visres.2003.12.016
复制
发表时间：
2004
期刊：
影响因子：
1.8
通讯作者：
Y. Yeshurun
中科院分区：
文献类型：
--
作者：
Y. Yeshurun
最近研究了瞬时空间注意对时间分辨率的影响，并与注意对空间分辨率的影响进行了比较。结果发现，与注意增强空间分辨率相反，瞬时注意损害时间分辨率。为了解释这些发现，提出了一种新的注意机制。这种注意力机制促进了所关注位置处的小细胞神经元，这反过来抑制了相同位置处的大细胞神经元的活动[Yeshurun & Levy，Psychol. Sci. 14（3）（2003 a）225]。本研究的目的是复制注意递减的时间分辨率（实验1），并进行直接测试，这“细小促进-大抑制”的假设。采用等亮度刺激（实验2a和2b）或红色背景（实验3）确保了细小系统是主要的系统介导性能。因此，任何由注意机制引起的微小-大抑制过程对表现的影响都很小。正如预测的那样，这些操作要么显着衰减或完全消除了时间分辨率的注意力递减。这些研究结果提供了直接支持的假设，即注意力有利于小细胞的大细胞神经元。
The effects of transient spatial attention on temporal resolution were recently studied and compared with attentional effects on spatial resolution. It was found that in contrast to the attentional enhancement of spatial resolution, transient attention impairs temporal resolution. To account for these findings a novel attentional mechanism was suggested. This attentional mechanism facilitates parvocellular neurons at the attended location, which in turn inhibit the activity of magnocellular neurons at the same location [Yeshurun & Levy, Psychol. Sci. 14 (3) (2003a) 225]. The goal of the present study was to replicate the attentional decrement in temporal resolution (Experiment 1), and perform direct tests of this `parvo facilitation––magno inhibition' hypothesis. The employment of isoluminant stimuli (Experiments 2a and 2b) or a red background (Experiment 3) ensured that the parvo system was the main system mediating performance. Consequently, any parvo–magno inhibitory processes elicited by the attentional mechanism should only have a minor effect on performance. As predicted, these manipulations either significantly attenuated or completely eliminated the attentional decrement in temporal resolution. These findings provide direct support to the hypothesis that attention favors parvocellular over magnocellular neurons.
登录
查看更多内容
色彩适应的闪烁光度研究：彩色背景选择性抑制锥体输入。
影响因子：
--
作者：
Eisner,A;Macleod,DI
通讯作者：
Macleod,DI
影响因子：
24.8
作者：
Robert Shapley
通讯作者：
Robert Shapley
影响因子：
56.9
作者：
TSO, DY;FROSTIG, RD;GRINVALD, A
通讯作者：
GRINVALD, A
影响因子：
5.5
作者：
DERRINGTON, AM;LENNIE, P
通讯作者：
LENNIE, P
DOI：
10.1073/pnas.95.3.831
发表时间：
1998-02-03
影响因子：
11.1
作者：
Corbetta, M
通讯作者：
Corbetta, M