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Illusory shrinkage of objects under backward masking.

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Backward masking, a visual phenomenon, can reduce target visibility. When not fully effective, this masking also shrinks the perceived size of visible targets, revealing new perceptual effects.

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Area of Science:

  • Psychology
  • Cognitive Science
  • Visual Perception

Background:

  • Backward masking is a well-established visual phenomenon.
  • It is known to significantly reduce or eliminate target visibility.

Purpose of the Study:

  • To investigate the effects of partially effective backward masking on target perception.
  • To determine if incomplete masking influences attributes beyond visibility, such as perceived size.

Main Methods:

  • Presenting visual targets under varying degrees of backward masking.
  • Measuring target visibility and perceived size under experimental conditions.

Main Results:

  • When backward masking was not fully effective, targets remained visible.
  • Visible targets experienced a significant reduction in perceived size due to the masking stimulus.

Conclusions:

  • Partial backward masking has a dual effect: it reduces visibility and alters perceived size.
  • This suggests that masking influences multiple aspects of visual object representation, not just detection.