Study of the relationship between attentional control and eye movement trajectories in serial visual search task.

为了研究连续视觉搜索、扫视轨迹曲率和微扫视的注意控制关系，我们分析了在判断随机安排的16个项目中是否包含目标时的眼球运动。结果表明，在判断目标存在之前，微眼跳频率下降。微跳跃发生在包含的道具多于偶然关卡的方向。微扫视方向、前扫视轨迹曲率与前扫视和后扫视方向之间无系统关系。这些结果表明，微尺度反映了在当前注视点附近寻找目标的过程。

To investigate the relationship between attentional control in serial visual search, saccade trajectory curvature and microsaccades, we analyzed eye movement while judging whether a target was contained in randomly arranged 16 items. The results showed that microsaccade frequency fell just before judging that the tareget was present. Microsaccades occurred in the direction where items were contained more than chance level. No systematic relationship was observed between microsaccade direction, trajectory curvature of the preceding saccade and directions of the preceding and following saccade. These results suggest that microsccades reflect the process of searching for the target near the current fixation point.