Evidence against a speed limit in multiple-object tracking
Evidence against a speed limit in multiple-object tracking
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DOI：
10.3758/pbr.15.4.802
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发表时间：
2008-08-01
影响因子：
3.5
通讯作者：
Enns, J. T.
中科院分区：
文献类型：
--
作者：
Franconeri, S. L.;Lin, J. Y.;Enns, J. T.
日常任务通常需要我们跟踪动态场景中的多个对象。过去的研究表明，随着物体移动得更快，跟踪变得更加困难。在本研究中，我们表明，这种权衡可能不是由于速度本身的增加，而是由于通常伴随着速度的增加而增加的拥挤。在这里，我们隔离的变化，在拥挤的速度，通过投影跟踪显示到一个小区域的中心半球投影圆顶或整个圆顶。使用更大的显示器增加了视网膜图像的大小和物体的速度的4倍，但没有增加interobject拥挤。结果表明，跟踪精度是同样好的大显示器的条件下，即使是当物体远到视觉周边。当我们测试在小显示器条件下限制性能的对象速度时，准确性也没有降低。这些结果，沿着对过去研究的重新解释，表明一旦物体拥挤的影响被消除，我们可能能够像跟踪单个移动物体一样快地跟踪多个移动物体。
Everyday tasks often require us to keep track of multiple objects in dynamic scenes. Past studies show that tracking becomes more difficult as objects move faster. In the present study, we show that this trade-off may not be due to increased speed itself but may, instead, be due to the increased crowding that usually accompanies increases in speed. Here, we isolate changes in speed from variations in crowding, by projecting a tracking display either onto a small area at the center of a hemispheric projection dome or onto the entire dome. Use of the larger display increased retinal image size and object speed by a factor of 4 but did not increase interobject crowding. Results showed that tracking accuracy was equally good in the large-display condition, even when the objects traveled far into the visual periphery. Accuracy was also not reduced when we tested object speeds that limited performance in the small-display condition. These results, along with a reinterpretation of past studies, suggest that we might be able to track multiple moving objects as fast as we can a single moving object, once the effect of object crowding is eliminated.