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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

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"...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Prosopagnosia01:24

Prosopagnosia

Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
Cognitive Development During Adulthood01:30

Cognitive Development During Adulthood

Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...

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Defining the Role Of Language in Infants' Object Categorization with Eye-tracking Paradigms
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Influence of visual deficits on object categorization in normal aging.

Quentin Lenoble1, Pierre Bordaberry, Marie-Bénédicte Rougier

  • 1Department of Psychology, Université Bordeaux, Bordeaux, France. quentin.lenoble@etud.ubordeaux2.fr

Experimental Aging Research
|February 21, 2013
PubMed
Summary

Older adults show deficits in object categorization, particularly with low contrast and peripheral vision, suggesting age-related changes in visual processing pathways. This impacts higher-level visual functions.

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Area of Science:

  • Vision science
  • Cognitive neuroscience
  • Gerontology

Background:

  • Age-related vision decline impacts visual processing.
  • Understanding how low-level visual changes affect higher-level cognition is crucial.

Purpose of the Study:

  • To investigate if age-related changes in low-level vision affect object categorization.
  • To examine the influence of contrast and visual field on age-related categorization deficits.

Main Methods:

  • Compared object categorization performance in 30 young and 30 older adults.
  • Manipulated image contrast (8% vs. 30%) and presentation eccentricity (central vs. peripheral).

Main Results:

  • Older adults were slower and less accurate than younger adults.
  • Deficits in older adults were more pronounced under low contrast and peripheral viewing conditions.
  • A category-specific deficit was observed in older adults for peripheral presentations.

Conclusions:

  • Age-related object categorization deficits are linked to reduced performance under low-contrast and peripheral conditions.
  • Findings suggest an age-related decline in the magnocellular visual pathway.
  • Results support the framework of age-related deficits in distinct visual processing streams.