目标大小变化对多目标视觉追踪的影响

The Study of the Influence of Target Size Changes on Multiple Object Tracking

采用多目标追踪任务(MOT)对追踪过程中被试(16名)的眼动进行记录,探讨目标特征变化对视觉追踪的影响。结果表明:视觉追踪机制能够对物体的特征属性进行编码加工,但加工程度受制于目标物与分心物之间的特征竞争关系;追踪过程中,视觉系统采用知觉组织加工策略,以被追踪目标构成的多边形中心为注意中心;物体大小特征没有引起较多的外源性注意,在物体大小特征的变化条件下,视觉追踪主要是内源性的注意控制加工过程。

The study investigated how the object feature change was processed by visual attention and the eye move- ments pattern during a multiple-object tracking （MOT） task, in which eye movements were moni- tored. Results indicated that properties of stimulus were encoded in attentive tracking, but the extent which features assisted tracking was limited by the competitive relation between targets and non-targets.The visual system adopted a perceptual grouping strategy to fixate closer to the center of the polygon formed by the targets. The size change of objects did not attract more exogenous attention, and visual tracking was primarily controlled by endogenous at- tention.