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Related Experiment Video

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Visual Acuity does not Moderate Effect Sizes of Higher-Level Cognitive Tasks.

James R Houston1, Ilana J Bennett2, Philip A Allen1

  • 1a Department of Psychology , The University of Akron , Akron , Ohio , USA.

Experimental Aging Research
|April 13, 2016
PubMed
Summary

This study found that visual acuity does not explain age-related cognitive differences. Our meta-analysis confirms that vision quality does not moderate how cognitive functions like memory and attention change with age.

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Area of Science:

  • Cognitive Neuroscience
  • Gerontology
  • Ophthalmology

Background:

  • Declining visual capacities in older adults are hypothesized to drive age differences in higher-order cognitive functions.
  • Previous research noted inadequate visual acuity measures in cognitive aging studies.
  • A prior meta-analysis found no evidence that visual acuity moderates age-related cognitive differences.

Purpose of the Study:

  • To extensively test whether visual acuity moderates age differences in higher-level cognitive processes.
  • To provide a more comprehensive meta-analytic examination of the relationship between vision and cognitive aging.

Main Methods:

  • Conducted a meta-analysis of 456 studies examining the main effect of age across attention, executive function, memory, and perception/language.
  • Calculated effect sizes for age effects stratified by five visual acuity criteria: no criteria, undisclosed, self-reported, 20/80-20/31, and 20/30 or better.

Main Results:

  • Age significantly affected all cognitive domains analyzed.
  • These age effects did not vary significantly based on the visual acuity criteria used in the studies.

Conclusions:

  • Visual acuity is not significantly related to age-related differences in higher-level cognitive performance.
  • Replicates findings that visual acuity does not mediate cognitive aging differences.
  • Further research should explore other visual functions like contrast sensitivity and luminance.