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首页> 外文期刊>Journal of Neurophysiology >Ocular tracking responses to background motion gated by feature-based attention
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Ocular tracking responses to background motion gated by feature-based attention

机译：通过基于特征的注意力控制对背景运动的眼动跟踪响应

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摘要

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 (?0?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.
机译：对背景运动的非自愿眼动追踪反应为运动计算的动力学提供了一个窗口。与空间注意相反，我们对基于特征的注意在确定这种眼反应中的作用了解甚少。为了探究背景运动对非自愿眼动的基于特征的影响，我们为人类观察者提供了平衡的背景扰动。观察者跟踪水平方向移动的目标时，两点云沿相反的垂直方向移动。另外，他们必须区分其中一朵云的运动方向的变化（与垂直方向成“ 0”角）。响应于所关注的云的运动发生了垂直的眼部跟随响应。当基于运动方向和点的颜色进行运动选择时，跟踪响应的峰值速度是只有一个背景运动方向的单个任务中引起的跟踪响应的30％。在另外两个实验中，当运动选择基于颜色时，通过使运动方向发生不可预测的变化，或者仅根据运动方向，我们测试了摄动的影响。尽管在所有实验中都大大降低了在水平方向上的追踪增益，这表明在感知和动眼任务之间进行了权衡，但只有在基于运动方向和颜色的情况下进行选择时，才能观察到对摄动的视觉响应。看来，只有在相关元素在运动开始之前可以被隔离时，才可以通过运动方向进行选择来有效地进行眼动追踪。

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