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Visual Agnosia

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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...

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Related Experiment Video

Updated: Jun 2, 2026

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Published on: March 10, 2021

Age-related changes in visual pseudoneglect.

Rémy Schmitz¹, Philippe Peigneux

¹UR2NF Unité de Recherches en Neuropsychologie et Neuroimagerie Fonctionnelle, Université Libre de Bruxelles, Campus du Solbosch CP191, Avenue F.D. Roosevelt 50, B-1050 Brussels, Belgium.

Brain and Cognition

|May 4, 2011

Summary

This summary is machine-generated.

Young adults show a leftward attentional bias, while older adults exhibit a rightward shift. This age-related change in spatial attention may stem from right hemisphere decline or other neural factors.

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Last Updated: Jun 2, 2026

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

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Published on: March 10, 2021

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

Published on: April 11, 2025

Area of Science:

Cognitive Neuroscience
Neuropsychology
Human Aging

Background:

Pseudoneglect, a leftward attentional bias, is common in young adults, often linked to right hemisphere dominance.
Normal aging may involve right hemisphere decline, potentially altering attentional biases.

Purpose of the Study:

To investigate age-related changes in spatial attention using a perceptual landmark task.
To test the hypothesis that aging shifts attentional bias from leftward to rightward.

Main Methods:

Comparison of attentional bias in young and older adult participants.
Utilized a perceptual landmark task to assess spatial attention.

Main Results:

Young adults displayed a significant leftward attentional bias.
Older adults showed a suppressed or reversed (rightward) attentional bias.
Evidence supports an age-related shift in spatial attention.

Conclusions:

Aging is associated with a shift in spatial attention from leftward to rightward.
Potential explanations include right hemisphere impairment with left hemispheric compensation, corpus callosum dysfunction, or changes in inhibition of return/dopamine levels.