Abertay Research Collections >
Social & Health Sciences >
Social & Health Sciences Collection >
Please use this identifier to cite or link to this item:
|Title: ||Contrast discrimination, non-uniform patterns and change blindness|
|Authors: ||Scott-Brown, Kenneth C.|
Orbach, H. S.
|Affiliation: ||University of Abertay Dundee. School of Social & Health Sciences|
Contrast increment thresholds
Set size effect
|Issue Date: ||Nov-1998|
|Publisher: ||The Royal Society|
|Type: ||Journal Article|
|Rights: ||Published version (c)The Royal Society, available from http://dx.doi.org/10.1098/rspb.1998.0553|
|Citation: ||Scott-Brown, K.C. and Orbach, H.S. 1998. Contrast discrimination, non-uniform patterns and change blindness. Proceedings of the Royal Society of London. Series B, Containing papers of a Biological character. 265(1411): pp.2159-2166. Available from http://dx.doi.org/10.1098/rspb.1998.0553|
|Abstract: ||Change blindness–our inability to detect large changes in natural scenes when saccades, blinks and other transients interrupt visual input–seems to contradict psychophysical evidence for our exquisite sensitivity to contrast changes. Can the type of effects described as ‘change blindness’ be observed with simple, multi–element stimuli, amenable to psychophysical analysis? Such stimuli, composed of five mixed contrast elements, elicited a striking increase in contrast increment thresholds compared to those for an isolated element. Cue presentation prior to the stimulus substantially reduced thresholds, as for change blindness with natural scenes. On one hand, explanations for change blindness based on abstract and sketchy representations in short–term visual memory seem inappropriate for this low–level image property of contrast where there is ample evidence for exquisite performance on memory tasks. On the other hand, the highly increased thresholds for mixed contrast elements, and the decreased thresholds when a cue is present, argue against any simple early attentional or sensory explanation for change blindness. Thus, psychophysical results for very simple patterns cannot straightforwardly predict results even for the slightly more complicated patterns studied here.|
|Appears in Collections:||Social & Health Sciences Collection|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.