Hallucination of moving objects revealed by a dynamic noise background
Hallucination of moving objects revealed by a dynamic noise background
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动态噪声背景揭示出移动物体的幻觉
DOI：
10.1101/2020.08.21.262170
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Holcombe Alex O.
中科院分区：
文献类型：
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作者：
Nakayama Ryohei;Holcombe Alex O.
我们表明，在一个动态的噪声背景下，感知消失的位置移动的运动对象的方向移动。这种“闪烁”错觉几乎不依赖于物体与背景的基于亮度或色度的混淆性，或者与物体运动相同方向上的背景运动能量的量。这表明，这种错觉是由动态噪声掩蔽偏移瞬变而实现的，否则偏移瞬变会伴随着对象的消失。虽然这些结果是一致的预期过程中，预先激活的位置之前的对象的当前位置，额外的研究结果提出了另一种解释：注意力跟踪对象消失后的延续。首先，当注意力被分散在两个移动的物体上时，这种转移会大大减少。第二，错觉与物体感知持续时间的延长有关，延长的量与从速度对错觉大小的影响（~50 ms）推断的外推程度相匹配。虽然预期外推理论没有预测到这一点，但注意力跟踪理论的延续却预测到了。具体来说，我们建议，在没有偏移瞬变，注意跟踪保持移动几十毫秒后的目标消失，这会导致一个幻觉的移动对象在注意的位置。
We show that on a dynamic noise background, the perceived disappearance location of a moving object is shifted in the direction of motion. This “twinkle goes” illusion has little dependence on the luminance- or chromaticity-based confusability of the object with the background, or on the amount of background motion energy in the same direction as the object motion. This suggests that the illusion is enabled by the dynamic noise masking the offset transients that otherwise accompany an object’s disappearance. While these results are consistent with an anticipatory process that pre-activates positions ahead of the object’s current position, additional findings suggest an alternative account: a continuation of attentional tracking after the object disappears. First, the shift was greatly reduced when attention was divided between two moving objects. Second, the illusion was associated with a prolonging of the perceived duration of the object, by an amount that matched the extent of extrapolation inferred from the effect of speed on the size of the illusion (~50 ms). While the anticipatory extrapolation theory does not predict this, the continuation of attentional tracking theory does. Specifically, we propose that in the absence of offset transients, attentional tracking keeps moving for several tens of milliseconds after the target disappearance, and this causes one to hallucinate a moving object at the position of attention.