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Visual Motion Perception, Visual Attention and Visual Information Processing

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Final rept.

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Continuing work on the three-systems-theory of visual motion perception I Isoluminant chromatic motion is perceived by and only by the third-order motion system. 2 New illusion. Cancelling salience modulation in the third-order motion system causes brightly colored moving red-green gratings to appear to be motionless motion standstill illusion that gives considerable insight into the mechanisms of object perception. 3 A prediction that motion could be used to provide amplification of apparent contrast was verified, with amplifications 5x. 4 Amplification procedures were used to construct purified stimuli to stimulate each motion system individually, and 5 to measure the amplification produced by selective attention to a feature. 6 Developed computational models oi attentional amplification of features and of the movement dynamics of spatial attention. The spatial attentional mode was investigated with a new paradigm gating spatial attention to enable measurements of iconic memory uncontaminated by attention dynamics and to demonstrate that a new attention window open concurrently at all points within the window. 7 The spatial attention model predicts 90 of the variance in a huge data set approximately 500 points per observer from 20,000 trials and encompasses the major attention paradigms. All items plus more are fully described in publications.

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  • Information Science
  • Personnel Management and Labor Relations

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