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Inhibition of return to occluded objects.

Do-Joon Yi1, Min-Shik Kim, Marvin M Chun

  • 1Department of Psychology, Yale University, New Haven, Connecticut 06520-8205, USA. dojoon.yi@yale.edu

Perception & Psychophysics
|January 9, 2004
PubMed
Summary

Researchers investigated if the visual system can track occluded objects, finding that attention can indeed select objects even when they are out of view. This challenges previous findings and supports active visual tracking of hidden items.

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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Neuroscience

Background:

  • Visual objects frequently undergo occlusion, necessitating active tracking mechanisms for ecological validity.
  • Inhibition of return (IOR) is a phenomenon typically studied with visible objects.

Purpose of the Study:

  • To investigate whether inhibition of return (IOR) can be observed with occluded objects.
  • To determine if attention can select and track objects that are temporarily out of view.

Main Methods:

  • Experiments involved presenting two moving objects that disappeared and reappeared behind occluders.
  • A cue and a probe were presented during the occlusion events.
  • Response times were measured to assess attentional effects.

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Main Results:

  • Responses were consistently delayed for cued objects that were occluded.
  • This delay occurred whether the object was cued, probed, or both while occluded.
  • Findings contradicted previous studies suggesting IOR is limited to visible objects.

Conclusions:

  • Attention can actively select and track occluded objects, even when they are not directly visible.
  • The visual system demonstrates a capacity for maintaining attentional focus on hidden items.
  • These results align with prior research on attentional effects for both visible and occluded objects.