If a patch of texture drifts in one direction while its internal texture drifts in the orthogonal direction, the perceived direction of this double-drift stimulus (also known as the infinite regress and curveball illusions) deviates strongly from its physical direction. Here, we use double-drift stimuli to construct two types of search arrays: The first had an oddball target in terms of the physical trajectories, but no oddball for the perceived trajectory, whereas the second had a perceptual oddball, but no physical oddball. We used these two arrays to determine whether pop-out operates over physical or perceived trajectories. Participants reported the location of the odd double-drift stimulus that had either a unique physical or perceived trajectory in a set of four or eight items. When the distractors all shared one perceived trajectory, but the target had an odd perceived trajectory, it popped out even though the physical trajectories of the stimuli were mixed: Accuracy rates were at ceiling, and response times decreased with increasing set size. In contrast, participants were significantly less accurate and slower at finding the physical oddball when all the paths had a common perceived trajectory. Moreover, responses became less accurate and slower with increasing set size. Our findings suggest that, at least for this type of stimulus, perceptual features can be processed rapidly, whereas the search for physical features is very inefficient.

中文翻译：

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弹出带有双漂移刺激的虚幻而不是真实的轨迹。

如果一块纹理在一个方向上漂移，而其内部纹理在正交方向上漂移，则这种双漂移刺激的感知方向（也称为无限回归和曲线球错觉）与其物理方向强烈偏离。在这里，我们使用双漂移刺激来构建两种类型的搜索阵列：第一种在物理轨迹方面有一个奇怪的目标，但对于感知轨迹没有奇怪的目标，而第二种有感知的奇怪，但没有物理的奇怪。我们使用这两个数组来确定弹出是否在物理或感知轨迹上运行。参与者报告了奇怪的双漂移刺激的位置，该刺激在一组四项或八项中具有独特的物理或感知轨迹。当干扰者都共享一个感知轨迹时，但是目标有一个奇怪的感知轨迹，即使刺激的物理轨迹是混合的，它也会突然出现：准确率处于上限，响应时间随着集合大小的增加而减少。相比之下，当所有路径都有一个共同的感知轨迹时，参与者在找到物理古怪时的准确度和速度明显降低。此外，随着集合大小的增加，响应变得不那么准确和缓慢。我们的研究结果表明，至少对于这种类型的刺激，感知特征可以被快速处理，而对物理特征的搜索效率很低。当所有路径都有一个共同的感知轨迹时，参与者在寻找物理怪球方面的准确度和速度明显降低。此外，随着集合大小的增加，响应变得不那么准确和缓慢。我们的研究结果表明，至少对于这种类型的刺激，感知特征可以被快速处理，而对物理特征的搜索效率很低。当所有路径都有一个共同的感知轨迹时，参与者在寻找物理怪球方面的准确度和速度明显降低。此外，随着集合大小的增加，响应变得更不准确和更慢。我们的研究结果表明，至少对于这种类型的刺激，感知特征可以被快速处理，而对物理特征的搜索效率很低。