High-capacity, transient retention of direction-of-motion information for multiple moving objects.
High-capacity, transient retention of direction-of-motion information for multiple moving objects.
复制标题
高容量、瞬时保留多个移动物体的运动方向信息。
DOI：
10.1167/10.6.8
复制
发表时间：
2010
影响因子：
1.8
通讯作者：
Ogmen,Haluk
中科院分区：
文献类型：
--
作者：
Shooner,Christopher;Tripathy,SrimantP;Bedell,HaroldE;Ogmen,Haluk
多目标跟踪范式（MOT）已被广泛用于研究动态视觉注意，但其基本机制，使这一能力还不清楚。围绕MOT的未解决问题包括运动（相对于位置）信息的相对重要性和各种记忆机制的作用。我们试图量化的能力和动态的保留方向的运动信息时，查看多个对象的运动刺激类似于那些在MOT。观察者观察三到九个随机线性运动的物体，然后在运动结束后报告运动方向。使用部分报告的范例和不同的设置大小和保留时间的参数，我们发现两个互补的记忆系统，一个短暂的高容量和第二个持续的系统与低容量的证据。对于瞬时高容量记忆，保持能力同样高，无论物体运动持续几秒钟或几分之一秒。此外，随着集合大小的增加，性能逐渐恶化，这支持了MOT的灵活容量理论。
The multiple-object tracking paradigm (MOT) has been used extensively for studying dynamic visual attention, but the basic mechanisms which subserve this capability are as yet unknown. Among the unresolved issues surrounding MOT are the relative importance of motion (as opposed to positional) information and the role of various memory mechanisms. We sought to quantify the capacity and dynamics for retention of direction-of-motion information when viewing a multiple-object motion stimulus similar to those used in MOT. Observers viewed three to nine objects in random linear motion and then reported motion direction after motion ended. Using a partial-report paradigm and varying the parameters of set size and time of retention, we found evidence for two complementary memory systems, one transient with high capacity and a second sustained system with low capacity. For the transient high-capacity memory, retention capacity was equally high whether object motion lasted several seconds or a fraction of a second. Also, a graded deterioration in performance with increased set size lends support to a flexible-capacity theory of MOT.