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On the failure to detect changes in scenes across brief interruptions

To determine the mechanisms behind induced "change blindness", 4 experiments examined its dependence on initial preview and on the nature of the interruptions used. Exp 1 gave Os an 8-sec uninterrupted preview of the original image before the flicker sequence began. Os remembered as much of the image as possible in order to improve their ability to notice change. Exp 2 examined change detection using blank field durations of 40 msec, 160 msec, and 320 msec. Results were combined with those obtained for the standard durations of 80 msec. Exp 3 examined 3 different colors of the blank field. Exp 4 used brief, localized achromatic "splats" that did not cover the areas of the image that were changed. Results support the proposal that representations at the early stages of visual processing are inherently volatile, and that focused attention is needed to stabilize them sufficiently to support the perception of change. (PsycINFO Database Record (c) 2005 APA, all rights reserved)



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