Higgins J Stephen, Wang Ranxiao Frances
Department of Psychology, University of Illinois Urbana-Champaign, IL 61820, USA.
Vision Res. 2010 Jan;50(2):242-8. doi: 10.1016/j.visres.2009.11.006. Epub 2009 Nov 10.
Perceiving the displacement of an object after a visual distraction is an essential ability to interact with the world. Previous research has shown a bias to perceive the first object seen after a saccade as stable while the second one moving (landmark effect). The present study examines the generality and nature of this phenomenon. The landmark effect was observed in the absence of eye movements, when the two objects were obscured by a blank screen, a moving-pattern mask, or simply disappeared briefly before reappearing one after the other. The first reappearing object was not required to remain visible while the second object reappeared to induce the bias. The perceived direction of the displacement was mainly determined by the relative displacement of the two objects, suggesting that the landmark effect is primarily due to a landmark calibration mechanism.
在视觉干扰后感知物体的位移是与世界互动的一项基本能力。先前的研究表明，存在一种偏向，即把扫视后看到的第一个物体视为静止的，而第二个物体是移动的（地标效应）。本研究考察了这一现象的普遍性和本质。当两个物体被空白屏幕、移动图案掩蔽物遮挡，或者只是短暂消失然后相继重新出现时，在没有眼动的情况下也观察到了地标效应。第二个物体重新出现以引发这种偏向时，并不要求第一个重新出现的物体保持可见。位移的感知方向主要由两个物体的相对位移决定，这表明地标效应主要是由于一种地标校准机制。
