Systematic distortions of perceptual stability investigated using immersive virtual reality.

Systematic distortions of perceptual stability investigated using immersive virtual reality.
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DOI:
10.1016/j.visres.2005.02.006
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发表时间:
2005-07
期刊:
影响因子:
1.8
通讯作者:
Glennerster A
Glennerster A
中科院分区:
心理学3区
文献类型:
--
作者:
Tcheang L;Gilson SJ;Glennerster A

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使用沉浸式虚拟现实系统,我们测量了观察者的能力,以检测旋转的对象时,它的运动被轭到观察者自己的翻译。大多数受试者都有很大的偏差,当他们移动时,一个静止的物体似乎会旋转离开他们。检测目标旋转的障碍与静态观察者进行的等效速度辨别任务的障碍相似,这表明视觉辨别是检测目标旋转的主要限制因素。添加一个稳定的视觉参考框架几乎消除了偏见。改变目标的观察距离几乎没有影响,这与观察者低估步行距离一致。然而,步行到一个简要介绍的视觉目标的准确性很高,并不符合低估步行距离。我们讨论了视觉空间的任务独立表示理论的影响。
Using an immersive virtual reality system, we measured the ability of observers to detect the rotation of an object when its movement was yoked to the observer's own translation. Most subjects had a large bias such that a static object appeared to rotate away from them as they moved. Thresholds for detecting target rotation were similar to those for an equivalent speed discrimination task carried out by static observers, suggesting that visual discrimination is the predominant limiting factor in detecting target rotation. Adding a stable visual reference frame almost eliminated the bias. Varying the viewing distance of the target had little effect, consistent with observers under-estimating distance walked. However, accuracy of walking to a briefly presented visual target was high and not consistent with an under-estimation of distance walked. We discuss implications for theories of a task-independent representation of visual space.
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