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On the perceived location of global motion

Mussap, Alexander Julien and Prins, Nicolaas 2002, On the perceived location of global motion, Vision research, vol. 42, no. 6, pp. 761-769, doi: 10.1016/S0042-6989(01)00304-2.

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Title On the perceived location of global motion
Author(s) Mussap, Alexander JulienORCID iD for Mussap, Alexander Julien orcid.org/0000-0003-1290-3680
Prins, Nicolaas
Journal name Vision research
Volume number 42
Issue number 6
Start page 761
End page 769
Publisher Pergamon
Place of publication Oxford, England
Publication date 2002-03
ISSN 0042-6989
1878-5646
Keyword(s) global motion
temporal compensation
latency
spatial extrapolation
flash-lag effect
perceived location
Summary We measured the effects of coherent motion of one set of dots on the perceived location of Gaussian envelopes formed by luminance modulation of a second set of dots. Perceived shifts in envelope location in the direction of coherent motion were obtained even when the dots forming the envelopes did not physically move in the direction of coherent motion. In such cases, perceived shifts coincided with stimulus configurations that permitted motion integration of the envelope dots with the coherently moving dots, for example, when envelope dots moved in random directions as opposed to being static. In subsequent experiments we explored the type of motion integration underlying the positional shifts obtained. We discounted the possibility that the visual system incorrectly attributes motion signals associated with coherently moving dots to envelope dots by demonstrating that positional shifts could be obtained even when the coherent dots were laterally displaced to either side of the envelope dots such that the regions occupied by the dots did not overlap. We also discounted spatio-temporal summation within the receptive fields of low-spatial-frequency motion-sensitive mechanisms by demonstrating that positional shifts persisted even when the dot displays were high-pass filtered. These results, coupled with the observation that the proportion of coherently moving dots required to produce positional shifts correlated well with global motion thresholds measured for the same dot configurations, suggests that visual processes which underlie motion-dependent positional shifts are based at least in part on cooperative interactions of the type implicated in global motion.
Language eng
DOI 10.1016/S0042-6989(01)00304-2
Field of Research 170112 Sensory Processes, Perception and Performance
Socio Economic Objective 970117 Expanding Knowledge in Psychology and Cognitive Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2002, Elsevier Science Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001625

Document type: Journal Article
Collection: School of Psychology
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