Wraga M, Creem S H, Proffitt D R
University of Virginia, USA.
Psychol Sci. 2000 May;11(3):239-43. doi: 10.1111/1467-9280.00248.
These studies examined the role of spatial encoding in inducing perception-action dissociations in visual illusions. Participants were shown a large-scale Müller-Lyer configuration with hoops as its tails. In Experiment 1, participants either made verbal estimates of the extent of the Müller-Lyer shaft (verbal task) or walked the extent without vision, in an offset path (blind-walking task). For both tasks, participants stood a small distance away from the configuration, to elicit object-relative encoding of the shaft with respect to its hoops. A similar illusion bias was found in the verbal and motoric tasks. In Experiment 2, participants stood at one endpoint of the shaft in order to elicit egocentric encoding of extent. Verbal judgments continued to exhibit the illusion bias, whereas blind-walking judgments did not. These findings underscore the importance of egocentric encoding in motor tasks for producing perception-action dissociations.
这些研究考察了空间编码在视觉错觉中诱发感知 - 行动分离方面的作用。向参与者展示了一个带有箍作为尾部的大规模缪勒 - 莱尔图形。在实验1中，参与者要么对缪勒 - 莱尔线段的长度进行言语估计（言语任务），要么在无视觉的情况下沿着一条偏移路径行走该长度（盲走任务）。对于这两个任务，参与者都站在离图形有一小段距离的地方，以引发线段相对于其箍的基于物体的编码。在言语和运动任务中发现了类似的错觉偏差。在实验2中，参与者站在线段的一个端点处，以引发对长度的自我中心编码。言语判断继续表现出错觉偏差，而盲走判断则没有。这些发现强调了自我中心编码在运动任务中产生感知 - 行动分离的重要性。
