Perceptual consequences of visual performance fields: The case of the line motion illusion
Perceptual consequences of visual performance fields: The case of the line motion illusion
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DOI：
10.1167/9.4.13
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发表时间：
2009-01-01
影响因子：
1.8
通讯作者：
Carrasco, Marisa
中科院分区：
文献类型：
--
作者：
Fuller, Stuart;Carrasco, Marisa
错觉线运动（ILM）是一种错觉，即一条线，前面有一个小点（线索）靠近一端，被认为是从点射出，即使这条线是物理呈现在一次。这种错觉是由低水平的运动效应、外源性空间注意力的梯度，还是两者兼而有之？鉴于外源性注意力在等偏心基数位置上不均匀地加速视觉处理（M。Carrasco，A. M. Giordano，& B. McElree，2004），我们假设注意力对ILM的贡献将遵循相同的模式。我们的特点是心理测量功能的感知线运动方向，1.5刺激与不同量的物理线运动（8级）在四个主要位置。我们使用了三个线索条件，以分离的影响，注意力从低水平motionVa单一线索提请注意的刺激位置，一个分布式的线索与元素附近的所有四个可能的刺激位置，没有视觉线索。分布式和单个线索沿着水平子午线产生相同的效果，但是单个线索的效果沿着垂直子午线逐渐增大，在顶部位置（“北”）处更是如此。我们的结论是，低层次的运动解释占大多数的典型例子的ILM（线前面有一个点）在我们的研究中使用的效果。
Illusory line motion (ILM) is the illusion that a line, preceded by a small dot (cue) near one end, is perceived to shoot out from the dot even though the line is physically presented at once. Does this illusion result from a low-level motion effect, a gradient of exogenous spatial attention, or both? Given that exogenous attention speeds visual processing unequally at isoeccentric cardinal locations (M. Carrasco, A. M. Giordano, & B. McElree, 2004), we hypothesized that the contribution of attention to ILM would follow the same pattern. We characterized psychometric functions of perceived line motion direction, for 1.5-stimuli with varying amounts of physical line motion (8 levels) at four cardinal locations. We used three cue conditions to separate the effects of attention from low-level motionVa single cue to draw focal attention to the stimulus location, a distributed cue with elements near all four possible stimulus locations, and no visual cue. Distributed and single cues generate identical effects along the horizontal meridian, but the effect of the single cue is progressively greater along the vertical meridian, more so at the top location (" North"). We conclude that the low-level motion explanation accounts for the majority of the canonical example of the ILM (line preceded by a single dot) effect used in our study.