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How to Build a Dichoptic Presentation System That Includes an Eye Tracker
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Unmasking the dichoptic mask.

Ben J Jennings1, Frederick A A Kingdom2

  • 1Centre for Cognitive Neuroscience, Department of Life Sciences, College of Health and Life Sciences, Brunel University London, UK.

Journal of Vision
|June 8, 2019
PubMed
Summary
This summary is machine-generated.

Task-irrelevant visual features reduce dichoptic masking, even when presented to only one eye. This finding suggests that matched binocular presentation is not required for these features to diminish visual masking effects.

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Area of Science:

  • Vision science
  • Perceptual psychology

Background:

  • Dichoptic masking, a phenomenon where a target is obscured by a mask presented to the opposite eye, can be reduced by task-irrelevant features.
  • It was previously unknown if these features require binocular presentation to be effective.

Purpose of the Study:

  • To investigate whether task-irrelevant features need to be matched in both eyes to reduce dichoptic masking.
  • To determine the role of monocular vs. binocular presentation of these features.

Main Methods:

  • Dichoptic masking was measured using luminance decrement and isoluminant violet patches as targets and masks.
  • Task-irrelevant ring stimuli (luminance decrement, isoluminant violet, or red) were presented around the target/mask patches.
  • The ring stimuli were presented either to both eyes (binocular) or only to the eye opposite the mask (monocular).

Main Results:

  • Dichoptic masking was significantly reduced when the task-irrelevant ring was presented.
  • The reduction in masking was comparable whether the ring was presented binocularly or monocularly to the target eye.
  • A computational model accounting for interocular inhibition from all stimulus components accurately predicted the results.

Conclusions:

  • Task-irrelevant features effectively reduce dichoptic masking regardless of whether they are presented to one or both eyes.
  • Monocular presentation of task-irrelevant features is sufficient to achieve the masking reduction.
  • Interocular inhibition plays a crucial role in mediating the effects of these features on visual masking.