Position representations lag behind targets in multiple object tracking
Position representations lag behind targets in multiple object tracking
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DOI：
10.1016/j.visres.2011.07.001
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发表时间：
2011-09-01
期刊：
影响因子：
1.8
通讯作者：
Holcombe, Alex O.
中科院分区：
文献类型：
--
作者：
Howard, Christina J.;Masom, David;Holcombe, Alex O.
在多目标跟踪（MOT）任务中，观察者通常可以跟踪多达四个移动的对象。然而，很少有人知道在何种程度上使用的对象运动的观察员在MOT。例如，方向和速度可用于预测未来位置。我们在这里要问的是，位置报告在多大程度上落后于目标，或者与推断的位置相对应。使用一系列不同的运动轨迹模式，观察者跟踪1-4个目标之间的分心，并报告的最终位置的目标之一。平均而言，报告对应的是以前的立场，而不是最后的立场。这种滞后在物体轨迹的大约10到70毫秒的条件下变化。虽然有人认为，外推发生在MOT，我们没有发现任何证据的预测未来的位置的目标。滞后随物体速度的显著增加与跟踪期间物体位置的缓慢或间歇更新一致。Crown版权所有（C）2011由Elsevier Ltd.发布。保留所有权利。
In the multiple object tracking (MOT) task, observers can typically keep track of up to four moving objects. Little is known however about the extent to which object motion is used by observers during MOT. For example, direction and speed might be used to anticipate future positions. We here ask to what extent position reports lag behind targets or instead correspond to extrapolated positions. Using a range of different motion trajectory patterns, observers tracked 1-4 targets among distracters and reported the final position of one of the targets. On average, reports corresponded to previous positions rather than the final position. This lag varied across conditions from around 10 to 70 ms of the object's trajectory. Although some have suggested that extrapolation occurs during MOT, we find no evidence of anticipation of future positions of targets. The significant increase in lag with speed of the object is consistent with slow or intermittent updating of object positions during tracking. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.