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Perceptual integration of motion and form information : evidence of parallel-continuous processing
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von Mühlenen, Adrian and Müller, Hermann J. (2000) Perceptual integration of motion and form information : evidence of parallel-continuous processing. Perception & Psychophysics, Volume 62 (Number 3). pp. 517-531. doi:10.3758/BF03212103 ISSN 0031-5117.
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Official URL: http://dx.doi.org/10.3758/BF03212103
Abstract
In three visual search experiments, the processes involved in the efficient detection of motion-form conjunction targets were investigated. Experiment 1 was designed to estimate the relative contributions of stationary and moving nontargets to the search rate. Search rates were primarily determined by the number of moving nontargets; stationary nontargets sharing the target form also exerted a significant effect, but this was only about half as strong as that of moving nontargets; stationary nontargets not sharing the target form had little influence. In Experiments 2 and 3, the effects of display factors influencing the visual (form) quality of moving items (movement speed and item size) were examined. Increasing the speed of the moving items (>1.5°/sec) facilitated target detection when the task required segregation of the moving from the stationary items. When no segregation was necessary, increasing the movement speed impaired performance: With large display items, motion speed had little effect on target detection, but with small items, search efficiency declined when items moved faster than 1.5 °/sec. This pattern indicates that moving nontargets exert a strong effect on the search rate (Experiment 1) because of the loss of visual quality for moving items above a certain movement speed. A parallel-continuous processing account of motion-form conjunction search is proposed, which combines aspects of Guided Search (Wolfe, 1994) and attentional engagement theory (Duncan & Humphreys, 1989).
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Psychology | ||||
Journal or Publication Title: | Perception & Psychophysics | ||||
Publisher: | Psychonomic Society | ||||
ISSN: | 0031-5117 | ||||
Official Date: | April 2000 | ||||
Dates: |
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Volume: | Volume 62 | ||||
Number: | Number 3 | ||||
Page Range: | pp. 517-531 | ||||
DOI: | 10.3758/BF03212103 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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