Schölvinck Marieke L, Rees Geraint
Institute of Cognitive Neuroscience, University College London, London, UK.
J Vis. 2009 Jan 29;9(1):38.1-9. doi: 10.1167/9.1.38.
Motion-induced blindness (MIB) is a visual phenomenon in which a highly salient, peripheral, visual target spontaneously disappears from visual awareness (and subsequently reappears) when superimposed on a globally moving background of distracters. Here, we investigated the influence of attention on these fluctuations in perception in two experiments. In the first experiment, directing spatial attention to the MIB target (and thus away from the distracters) led to an increased probability of disappearance of the target. This counter-intuitive effect of attention enhancing disappearance is nonetheless consistent with earlier reports that increased target salience enhances disappearance. Conversely, in a second experiment withdrawing attention from the entire MIB display (both target and distracters) led to a decrease in perceptual disappearances and reappearances, as well as prolonged periods of invisibility. Taken together these findings suggest that the global availability of attention facilitates competition between target and moving distracters, while the local direction of attention toward or away from the target can influence the outcome of that competition. Thus, in common with other related perceptual phenomena, attention has complex effects on the dynamics of target-distracter interactions associated with motion-induced blindness.
运动诱导性失明（MIB）是一种视觉现象，即当一个高度显著的外周视觉目标叠加在一个全局移动的干扰物背景上时，它会自发地从视觉感知中消失（随后又重新出现）。在此，我们通过两个实验研究了注意力对这些感知波动的影响。在第一个实验中，将空间注意力导向MIB目标（从而远离干扰物）会导致目标消失的概率增加。然而，这种注意力增强消失的反直觉效应与早期报告一致，即目标显著性增加会增强消失。相反，在第二个实验中，将注意力从整个MIB显示（目标和干扰物）上撤离会导致感知上的消失和重新出现减少，以及不可见期延长。综合这些发现表明，注意力的全局可用性促进了目标与移动干扰物之间的竞争，而注意力朝向或远离目标的局部方向会影响该竞争的结果。因此，与其他相关的感知现象一样，注意力对与运动诱导性失明相关的目标 - 干扰物相互作用的动态具有复杂的影响。
