How Does Attention Alter Length Perception? A Prism Adaptation Study
How Does Attention Alter Length Perception? A Prism Adaptation Study
复制标题
注意力如何改变长度感知？
DOI：
10.3389/fpsyg.2020.02091
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发表时间：
2020-08-18
影响因子：
3.8
通讯作者：
Luo, Li-Juan
中科院分区：
文献类型：
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作者：
Cai, Yong-Chun;Su, Xian;Luo, Li-Juan
注意力如何影响物体的感知大小（长度）一直存在争议。棱镜适应（PA）作为一种感觉运动适应，已被证明会影响忽视患者和健康个体在各种空间任务中的表现。据推测，PA的作用可能是由注意力机制介导的。在这项研究中，我们使用PA来横向转移空间注意力，并采用精确的心理物理程序来检查线条的感知长度如何受到这种注意力转移的影响。参与者在左视野和右视野中看到两条独立的线，并比较两条线的长度。45名健康的参与者完成了这一行的长度判断任务之前和之后的一段时间的适应，无论是左（实验1）或右移（实验2）棱镜，或控制护目镜，没有转移的视觉场景（实验3）。我们发现，参与者最初倾向于认为左边的线条更长。这种长度知觉的偏误通过对左偏PA的短期视觉适应来减少。然而，对于右移PA和普通玻璃护目镜条件，对左线的初始长度感知偏差不受影响。对PA的这种不对称效应的机理进行了讨论。我们的研究结果表明，一条线的长度知觉可以影响一个简单的视觉适应，这可能会转移空间注意。这一发现与注意力可以改变外表的观点是一致的。
How perceived size (length) of an object is influenced by attention is in debate. Prism adaptation (PA), as a type of sensory motor adaptation, has been shown to affect performance on a variety of spatial tasks in both neglect patient and healthy individuals. It has been hypothesized that PA’s effects might be mediated by attentional mechanisms. In this study, we used PA to laterally shift spatial attention, and employed a precise psychophysical procedure to examine how the perceptual length of lines was influenced by this attentional shifting. Participants were presented with two separate lines in the left and right visual fields, and compared the length of the two lines. Forty-five healthy participants completed this line-length judgment task before and after a short period of adaptation to either left- (Experiment 1) or right-shifting (Experiment 2) prisms, or control goggles that did not shift the visual scene (Experiment 3). We found that participants initially tended to perceive the line presented in the left to be longer. This leftward bias of length perception was reduced by a short period of visuomotor adaptation to the left-deviating PA. However, for the right-shifting PA and plain glass goggles conditions, the initial length perception bias to the left line was unaffected. Mechanisms of this asymmetric effect of PA was discussed. Our results demonstrate that the length perception of a line can be influenced by a simple visuomotor adaptation, which might shift the spatial attention. This finding is consistent with the argument that attention can alter appearance.