Jüttner M, Röhler R
Institute of Medical Optics, University of Munich, Germany.
Percept Psychophys. 1993 Feb;53(2):210-20. doi: 10.3758/bf03211731.
Our perception of the visual world remains stable and continuous despite the disruptions caused by retinal image displacements during saccadic eye movements. The problem of visual stability is closely related to the question of whether information is transferred across such eye movements--and if so, what sort of information is transferred. We report experiments carried out to investigate how presaccadic signals at the location of the saccade goal influence the visibility of postsaccadic test signals presented at the fovea. The signals were Landolt rings of different orientations. If the orientations of pre- and postsaccadic Landolt rings were different, the thresholds of the test signals were elevated by about 20%-25% relative to those at the static control condition. When the orientations were identical, no such elevation occurred. This selective threshold elevation effect proved to be a phenomenon different from ordinary saccadic suppression, although it was closely related to the execution of the saccadic eye movement. The consequences for visual stability are discussed.
尽管在快速眼动过程中视网膜图像位移会造成干扰，但我们对视觉世界的感知仍保持稳定和连续。视觉稳定性问题与信息是否能在这种眼动过程中传递密切相关——如果能传递，传递的是何种信息。我们报告了一些实验，旨在研究扫视目标位置的扫视前信号如何影响在中央凹呈现的扫视后测试信号的可见性。这些信号是不同方向的兰道环。如果扫视前和扫视后的兰道环方向不同，与静态对照条件相比，测试信号的阈值会提高约20% - 25%。当方向相同时，则不会出现这种提高。这种选择性阈值提高效应被证明是一种不同于普通扫视抑制的现象，尽管它与快速眼动的执行密切相关。我们还讨论了其对视觉稳定性的影响。
