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Covert visual orienting across the lifespan

D A Brodeur1, J T Enns

  • 1University of British Columbia.

Canadian Journal of Experimental Psychology = Revue Canadienne De Psychologie Experimentale
|March 1, 1997
PubMed
Summary

Visual orienting mechanisms differ by age. While stimulus-driven attention shows few age differences, voluntary, intentional attention varies significantly across childhood, young adulthood, and older age groups.

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Area of Science:

  • Cognitive Psychology
  • Developmental Psychology
  • Neuroscience

Background:

  • Covert visual orienting, the ability to shift attention without moving the eyes, is crucial for information processing.
  • Age-related changes in cognitive functions, including attention, are well-documented but specific mechanisms of orienting across the lifespan require further investigation.

Purpose of the Study:

  • To investigate age-related differences in stimulus-based versus information-based covert visual orienting.
  • To determine if distinct attentional mechanisms are employed by different age groups.

Main Methods:

  • Utilized response time (RT) measures to assess speeded discrimination tasks in participants aged 6 to 73 years.
  • Employed both abrupt stimulus cues and voluntary information cues to probe spatial orienting.
  • Monitored eye movements to control for fixation stability across age groups.

Main Results:

  • Stimulus-cued orienting showed minimal age-related differences.
  • Intentional orienting revealed significant age effects: children struggled with sustained orienting, and older adults were slower to utilize cues.
  • Young adults demonstrated superior ability to utilize information cues amidst conflicting stimulus cues compared to children and older adults.

Conclusions:

  • Evidence suggests distinct neural mechanisms underlie stimulus-driven and information-driven spatial orienting.
  • Age impacts intentional attentional control more than stimulus-driven orienting, highlighting developmental and aging trajectories in executive functions.

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