Color-selective attention need not be mediated by spatial attention
Color-selective attention need not be mediated by spatial attention
复制标题
DOI：
10.1167/9.6.2
复制
发表时间：
2009-01-01
影响因子：
1.8
通讯作者：
Hillyard, Steven A.
中科院分区：
文献类型：
--
作者：
Andersen, Soren K.;Mueller, Matthias M.;Hillyard, Steven A.
注意可以根据非空间特征（如颜色、方向或运动方向）选择刺激进行优先处理。然而，关于特征选择性注意是通过增加待关注特征的信号强度而不考虑其空间位置，还是通过将空间注意的焦点引导到包含相关特征的位置来起作用，证据是混合的。为了解决这个问题，我们设计了一个任务，其中特征选择注意不能由空间选择介导。参与者观察了两种颜色的混合点的显示，这些点快速且不可预测地改变了位置，任务是检测一种或另一种颜色的点亮度降低20%的短暂间隔。行为指标和稳态视觉诱发电位的电生理测量结果均显示，被试对有色物品的加工选择性增强。结果表明，特征选择性注意在视觉皮层的早期水平产生了感觉增益增强，而这种增强没有空间注意的中介作用。
It is well-established that attention can select stimuli for preferential processing on the basis of non-spatial features such as color, orientation, or direction of motion. Evidence is mixed, however, as to whether feature-selective attention acts by increasing the signal strength of to-be-attended features irrespective of their spatial locations or whether it acts by guiding the spotlight of spatial attention to locations containing the relevant feature. To address this question, we designed a task in which feature-selective attention could not be mediated by spatial selection. Participants observed a display of intermingled dots of two colors, which rapidly and unpredictably changed positions, with the task of detecting brief intervals of reduced luminance of 20% of the dots of one or the other color. Both behavioral indices and electrophysiological measures of steady-state visual evoked potentials showed selectively enhanced processing of the attended-color items. The results demonstrate that feature-selective attention produces a sensory gain enhancement at early levels of the visual cortex that occurs without mediation by spatial attention.