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Related Concept Videos

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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: Jul 18, 2026

Generating Strictly Controlled Stimuli for Figure Recognition Experiments
05:39

Generating Strictly Controlled Stimuli for Figure Recognition Experiments

Published on: March 18, 2019

Texture discrimination asymmetries across the visual field.

Cindy Potechin1, Rick Gurnsey

  • 1Department of Psychology, Concordia University, 7141 Sherbrook Street West, Montreal, QC, Canada.

Spatial Vision
|November 30, 2006
PubMed
Summary

Texture discrimination asymmetry and central performance drop (CPD) interact in complex ways. Performance depends on texture arrangement and viewing distance (eccentricity).

Area of Science:

  • Visual perception
  • Computational neuroscience
  • Psychophysics

Background:

  • Texture discrimination can be asymmetrical, with one texture being easier to detect within another.
  • A central performance drop (CPD) is often observed, where visual performance decreases in the periphery.
  • The interplay between texture asymmetry and CPD is not well understood.

Purpose of the Study:

  • To investigate how texture discrimination asymmetries change with eccentricity.
  • To explore the interaction between stimulus arrangement and the central performance drop (CPD).

Main Methods:

  • Utilized four stimulus pattern pairs known to produce asymmetrical texture discrimination.
  • Examined texture discrimination performance at varying eccentricities (distances from central vision).

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Last Updated: Jul 18, 2026

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Main Results:

  • Observed three distinct patterns: (i) CPD present, no asymmetry; (ii) no CPD, asymmetry present; (iii) asymmetry varied with eccentricity, peaking around 3 degrees.
  • The 'stronger' texture in a pair often showed a CPD.

Conclusions:

  • Texture discriminability is not inherent to a pair but depends on arrangement and viewing eccentricity.
  • Visual performance in texture discrimination is influenced by both spatial layout and location in the visual field.