视觉搜索中多目标追踪的研究

在视觉信息的选择加工过程中 ,只有很少信息能够通过注意系统得到进一步的认知加工 ,其中视觉搜索起着十分重要的作用。本研究基于动态视觉信息注意追踪的研究 ,采用 3× 2× 2的实验设计 ,从如下三方面对注意追踪的规律进行了探讨 :(1)分心物数量 (1,5和 9)的变化对多目标注意追踪的影响 ;(2 )目标的显著性 (特征变化和特征不变 )对多目标注意追踪的影响 ;(3)目标运动形式 (目标随机运动和目标运动形式不变 )对多目标注意追踪的影响。研究结果表明 :(1)分心物数量的增加对目标的注意识别没有抑制作用 ;(2 )特征变化目标的注意识别速度显著高于特征不变的目标 ;(3)运动形式不变的目标较运动形式变化目标的注意识别速度快。

Multiple Objects Tracking in Visual Search

When multiple visual information compete to make entry to the brain,only a small number of visual information can be accessed to subsequent cognitive process,so visual indexing in attention process has important effect on the subsequent cognitive process.The present study used a 3×2×2 within subject design,focus on three factors:(1)What are the effects on target identification with the number of distractors increasing in moving task?(2)Does the salience of targets facilitate the visual indexing in moving task?(3)What are the differences between form-changing and no form-changing targets identification in multiple object tracking.The results showed:(1)Salient targets had attention priority.(2)Form-unchanging targets made entry to attention system faster than form-changing targets.(3)Either the color of targets and form of targets changed or unchanged,the response latencies decreased as distractors increased.