%0 Journal Article
%T On the time course of perceptual information that results from a brief visual presentation
%J Journal of experimental psychology: human perception and performance
%D 1992
%A Loftus, G. R.
%A Duncan, J.
%A Gehrig, P.
%V 18
%N 2
%P 530-49; discussion 550
%X A briefly presented visual stimulus engenders an available-information function that lags behind the physical stimulus. We report two experiments that focus on the iconic-decay portion of this function, which falls to 0 over a 200-300 ms period following stimulus offset. In each experiment, to-be-reported digit strings were shown for varying durations followed by a noise mask at varying poststimulus intervals. We found the shape of the performance curve relating digit-report probability to stimulus exposure duration to be independent of stimulus-mask interstimulus interval. This finding is consistent with the proposition that the iconic-decay function's shape is independent of stimulus duration and allows us to identify this shape. We rejected exponential iconic decay for 6 of 8 observers; however, all observers' decay functions could be adequately fit by gamma decay, a generalization of exponential decay.<p /> <p>Language: en</p>
%G en
%I American Psychological Association
%@ 0096-1523
%U http://dx.doi.org/