Pointing movements are affected by size-contrast illusions
Pointing movements are affected by size-contrast illusions
复制标题
指向动作受到大小对比错觉的影响
DOI：
10.1007/s002210050710
复制
发表时间：
1999
影响因子：
2
通讯作者：
P. Donkelaar
中科院分区：
文献类型：
--
作者：
P. Donkelaar
本研究调查了视觉目标的感知大小对指向运动特征的影响。采用了一种尺寸对比错觉，称为艾宾浩斯圆或蒂切纳圆。在这种错觉中，被几个较小圆圈包围的目标圆圈被认为比被几个较大圆圈包围的相同物理尺寸的目标圆圈更大。指向感知上较小的目标圆的开环指向响应的移动时间明显长于指向感知上更大的目标圆的指向响应的移动时间。这种差异的程度类似于当指向响应指向物理上不同大小且未被其他圆圈包围的目标圆圈时观察到的差异。此外，当感知较小的圆圈被放大到与感知较大的圆圈大小相同时，运动时间变得相等。该证据支持这样的论点：目标的相对大小而不是绝对大小对指向运动的控制和执行具有重大影响。这样的结论与之前关于在类似条件下进行的抓取动作的结论相矛盾，并且意味着指向反应比抓取反应更直接地受到视觉感知处理的影响。
The influence that the perceived size of visual targets has on the characteristics of pointing movements was investigated in the present study. A size-contrast illusion, known as the Ebbinghaus or Tichener circles, was employed. In this illusion, a target circle surrounded by several smaller circles is perceived to be larger than a target circle of the same physical size surrounded by several larger circles. Movement times of open-loop pointing responses directed to the perceptually smaller target circle were significantly longer than the movement times of pointing responses directed to the perceptually larger target circle. The extent of this difference was similar to that observed when pointing responses were directed at physically different-sized target circles that were not surrounded by other circles. In addition, when the perceptually smaller circle was enlarged so that it appeared to be the same size as the perceptually larger circle, the movement times became equivalent. This evidence supports the contention that the relative rather than the absolute size of the target has a major impact on the control and execution of pointing movements. Such a conclusion contradicts those made previously concerning grasping movements made under similar conditions and implies that pointing responses are more directly influenced by visual perceptual processing than grasping responses.