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Lookup NU author(s): Dr Andrew Welchman, Professor Julie Harris
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A peripherally presented target embedded in dynamic texture perceptually disappears (or 'fills-in') after around 10 s of steady fixation. This phenomenon was investigated for a target containing moving dots. The effects of manipulating the coherence of the motion within the target and the density of dots across the whole screen were explored. Coherence thresholds for the detection of a target at different dot densities were recorded for comparison. Fading occurred faster as either motion coherence or dot density was reduced. Coherence thresholds for target detection were unaffected by manipulations of dot density. There appeared to be no relationship between the stimulus exposure time needed for fading and the coherence threshold for detection of a target. The results suggest that the time taken for a target to fade is not a simple function of its motion detection threshold.
Author(s): Welchman AE; Harris JM
Publication type: Article
Publication status: Published
Journal: Spatial Vision
Year: 2001
Volume: 14
Issue: 1
Pages: 45-58
Print publication date: 01/01/2001
ISSN (print): 0169-1015
ISSN (electronic): 1568-5683
Publisher: VSP
URL: http://dx.doi.org/10.1163/156856801741350
DOI: 10.1163/156856801741350
PubMed id: 11334181
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