Ocular tracking responses to background motion gated by feature-based attention.
Ocular tracking responses to background motion gated by feature-based attention.
复制标题
对背景运动的眼部跟踪反应由基于特征的注意力控制。
作者：
D. Souto;D. Kerzel
对背景运动的非自愿眼追踪反应为运动计算的动力学提供了一个窗口。与空间注意力相比，我们对基于特征的注意力在决定这种眼部反应中的作用知之甚少。为了探究背景运动对非自愿眼球运动的基于特征的影响，我们向人类观察者展示了一个平衡的背景扰动。两团圆点在垂直方向相反的方向上移动，而观察者则跟踪一个在水平方向上移动的目标。此外，他们还必须分辨出其中一朵云的运动方向变化（从垂直方向±10°）。垂直眼跟随反应发生在对被观察云运动的反应中。当根据运动方向和点的颜色选择运动时，跟踪响应的峰值速度是背景运动只有一个方向的单任务跟踪响应的30%。在另外两个实验中，我们测试了当运动选择基于颜色、运动方向不可预测地变化或仅运动方向时扰动的影响。尽管在所有实验中，在水平方向上的追求增益都显著减少，这表明在知觉任务和动眼力任务之间存在权衡，但只有在运动方向和颜色都是选择的情况下，才观察到眼睛对扰动的反应。运动方向选择只有在运动开始前分离相关元素时才能有效地驱动眼动追踪。
Involuntary ocular tracking responses to background motion offer a window on the dynamics of motion computations. In contrast to spatial attention, we know little about the role of feature-based attention in determining this ocular response. To probe feature-based effects of background motion on involuntary eye movements, we presented human observers with a balanced background perturbation. Two clouds of dots moved in opposite vertical directions while observers tracked a target moving in horizontal direction. Additionally, they had to discriminate a change in the direction of motion (±10° from vertical) of one of the clouds. A vertical ocular following response occurred in response to the motion of the attended cloud. When motion selection was based on motion direction and color of the dots, the peak velocity of the tracking response was 30% of the tracking response elicited in a single task with only one direction of background motion. In two other experiments, we tested the effect of the perturbation when motion selection was based on color, by having motion direction vary unpredictably, or on motion direction alone. Although the gain of pursuit in the horizontal direction was significantly reduced in all experiments, indicating a trade-off between perceptual and oculomotor tasks, ocular responses to perturbations were only observed when selection was based on both motion direction and color. It appears that selection by motion direction can only be effective for driving ocular tracking when the relevant elements can be segregated before motion onset.
影响因子：
2.5
作者：
Beauchamp, MS;Cox, RW;DeYoe, EA
通讯作者：
DeYoe, EA
影响因子：
2.5
作者：
Jonikaitis, Donatas;Theeuwes, Jan
通讯作者：
Theeuwes, Jan