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Interocular grouping without awareness.

San-Yuan Lin1, Su-Ling Yeh2

  • 1Department of Psychology, National Taiwan University, Taipei, Taiwan.

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|February 7, 2016
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Summary
This summary is machine-generated.

Interocular grouping, where visual elements from each eye form a whole, can occur even when parts are invisible. This study shows grouping happens without full awareness, challenging prior assumptions.

Keywords:
AwarenessBinocular rivalryContinuous flash suppressionInterocular groupingObject-based attention

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception

Background:

  • Interocular grouping integrates visual information from both eyes.
  • Previous research suggested simultaneous visibility for grouping, but continuous flash suppression (CFS) challenges this.
  • Binocular rivalry (BR) and CFS induce different levels of visual suppression.

Purpose of the Study:

  • To investigate if interocular grouping requires conscious awareness of all constituent parts.
  • To determine if object-based attention influences interocular grouping under suppression.

Main Methods:

  • Utilized a modified double-rectangle paradigm with dichoptic presentation of complementary parts.
  • Employed continuous flash suppression (CFS) to render one part of the stimulus invisible.
  • Used object-based attention cues and concurrent target presentation to assess grouping and awareness.

Main Results:

  • Participants more frequently reported targets appearing first on the cued rectangle after interocular grouping.
  • This effect persisted even when the suppressed parts of the grouped objects were invisible.
  • Results indicate grouping occurred without full awareness of all contributing visual elements.

Conclusions:

  • Interocular grouping can occur without conscious perception of all contributing visual elements.
  • This finding suggests that visual processing for grouping extends beyond conscious awareness.
  • Object-based attention plays a role in facilitating interocular grouping even under conditions of visual suppression.