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Related Experiment Videos

Attention affects the stereoscopic depth aftereffect.

David Rose1, Mark F Bradshaw, Paul B Hibbard

  • 1Department of Psychology, University of Surrey, Guildford GU2 7XH, UK. d.rose@surrey.ac.uk

Perception
|July 12, 2003
PubMed
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Attention influences depth perception. This study shows that attentional focus can alter the duration of depth aftereffects, challenging previous models of preattentive vision.

Area of Science:

  • Cognitive Neuroscience
  • Visual Perception

Background:

  • Preattentive vision encompasses low-level processes like depth and motion perception.
  • Previous research indicated attention can modulate motion aftereffects, questioning the independence of low-level vision.

Purpose of the Study:

  • To investigate if attention also affects depth aftereffects.
  • To determine the relationship between attentional load and visual aftereffects.

Main Methods:

  • Subjects adapted to random-dot patterns creating depth planes.
  • Attention was manipulated using a secondary character-processing task with varying difficulty.
  • The duration of depth and motion aftereffects was measured.

Main Results:

  • Attentional manipulations significantly affected the duration of the depth aftereffect.

Related Experiment Videos

  • Both depth and motion aftereffect durations correlated with the difficulty of the secondary attentional task.

    • Conclusions:

    • Low-level visual processes, including depth perception, are penetrable by attentional mechanisms.
    • Findings support dynamic feedback models of visual processing, suggesting attention influences early sensory stages.