What you see is what you need
What you see is what you need
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DOI：
10.1167/3.1.9
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发表时间：
2003-01-01
影响因子：
1.8
通讯作者：
Sullivan, BT
中科院分区：
文献类型：
--
作者：
Triesch, J;Ballard, DH;Sullivan, BT
我们研究了注意力和任务要求在内隐变化检测中的作用。受试者在虚拟现实环境中进行物体分类任务，在该任务中，我们在受试者操纵物体的同时改变物体的属性。该任务确保受试者在改变之前和之后立即查看改变的物体。我们的研究结果表明，在这种情况下，受试者的能力，注意到对象的变化强烈依赖于瞬时任务的要求。令人惊讶的是，频繁的注意并不能保证任务相关的变化对象属性本身，但变化的对象属性需要在正确的时间任务相关。此外，所使用的对象的简单性表明，变化盲视发生在视觉短期记忆负荷最小的情况下，这表明短期记忆限制和变化盲视之间存在潜在的分离。最后，我们发现，如果受试者在变化的时刻视觉跟踪对象，变化甚至可能被忽视。我们的实验表明，人类视觉具有高度目的性和任务特定性，从固定点提取的信息仅在需要解决当前目标时用于某些计算。
We studied the role of attention and task demands for implicit change detection. Subjects engaged in an object sorting task performed in a virtual reality environment, where we changed the properties of an object while the subject was manipulating it. The task assures that subjects are looking at the changed object immediately before and after the change. Our results demonstrate that in this situation subjects' ability to notice changes to the object strongly depends on momentary task demands. Surprisingly, frequent noticing is not guaranteed by task relevance of the changed object attribute per se, but the changed object attribute needs to be task relevant at exactly the right times. Also, the simplicity of the used objects indicates that change blindness occurs in situations where the visual short term memory load is minimal, suggesting a potential dissociation between short term memory limitations and change blindness. Finally, we found that changes may even go unnoticed if subjects are visually tracking the object at the moment of change. Our experiments suggest a highly purposive and task specific nature of human vision, where information extracted from the fixation point is used for certain computations only "just in time" when needed to solve the current goal.