How an abrupt onset cue can release motion-induced blindness

In motion-induced blindness (MIB), a target within rotating random dots is occasionally hidden from observers' consciousness during observation. In the present study, a red ring-like cue was centered on a target and presented immediately after observers reported subjective disappearance of the target in MIB (Experiment 1). The radius of the cue was systematically modulated. Observers quickly regained awareness of the disappeared object only after they were provided with a pinpoint cue of its location. We also found that a flickering cue at I Hz hindered MIB when the radius of the cue was critically small (Experiment 2). Furthermore, abrupt onset of a small square was enough to regain awareness of the target (Experiment 3). Successful revival of the target with a small cue indicates that critical spatial distribution of visual attention determines what in the visual scene is included in visual awareness. (c) 2006 Elsevier Inc. All rights reserved.