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Related Concept Videos

Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.

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Related Experiment Video

Updated: Jun 27, 2026

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
07:45

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition

Published on: July 21, 2020

Monocular patching may induce ipsilateral "where" spatial bias.

Peii Chen1, Lillian Erdahl, Anna M Barrett

  • 1Stroke Rehabilitation Research Laboratory, the Kessler Foundation Research Center, The University of Medicine and Dentistry, NJ - NJ Medical School (UMDNJ-NJMS), West Orange, NJ 07052, United States. pchen@kessler.foundation.de

Neuropsychologia
|December 23, 2008
PubMed
Summary
This summary is machine-generated.

Monocular patches can cause spatial bias, leading to ipsilateral "where" errors. This suggests compensatory resource reallocation due to visual deprivation, not the Sprague effect.

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Related Experiment Videos

Last Updated: Jun 27, 2026

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
07:45

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition

Published on: July 21, 2020

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
08:42

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex

Published on: February 8, 2020

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visual Perception

Background:

  • Spatial bias involves asymmetries in spatial information processing or action.
  • The Sprague effect describes a contralateral bias from monocular patches.
  • Ipsilateral bias may arise from compensatory resource reallocation or tactile distraction.

Purpose of the Study:

  • To investigate the mechanisms behind monocular patch-induced spatial bias.
  • To differentiate between contralateral (Sprague effect) and ipsilateral spatial biases.
  • To determine the roles of visual deprivation and tactile distraction in spatial bias.

Main Methods:

  • Neurologically normal adults bisected horizontal lines under various conditions: no patch, monocular patch, tactile-only occlusion, and visual-only occlusion.
  • A video apparatus reversed visual feedback to fractionate "where" and "aiming" spatial bias components.
  • Behavioral data on line bisection accuracy were analyzed.

Main Results:

  • Monocular patch use induced ipsilateral "where" spatial errors.
  • These findings contradict the contralateral bias predicted by the Sprague effect.
  • The results indicate that visual deprivation, not tactile distraction, is the primary driver of the observed ipsilateral bias.

Conclusions:

  • Monocular patch-induced ipsilateral "where" spatial bias is primarily driven by compensatory top-down resource reallocation to the deprived visual field.
  • The findings challenge the traditional understanding of monocular patch effects, highlighting the brain's adaptive mechanisms.
  • Further research can explore the neural underpinnings of this compensatory spatial re-allocation.