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Aging leads to predictive gaze allocation during interception.

Leonard Gerharz1,2, Dimitris Voudouris1,2

  • 1Experimental Psychology, Justus Liebig University Giessen, Giessen, Germany.

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|July 23, 2025
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Summary
This summary is machine-generated.

Older adults use predictive gaze strategies to maintain high performance in motor tasks despite age-related declines. This adaptive gaze allocation helps them intercept moving objects effectively.

Keywords:
agingeye movementseye-hand coordinationsmooth pursuitvisuomotor control

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Area of Science:

  • Neuroscience
  • Human Aging
  • Motor Control

Background:

  • Healthy aging often involves declines in cognitive, sensory, and motor functions, leading to slower sensorimotor processes.
  • Age-related sensorimotor limitations can impact performance in complex tasks requiring precise timing and coordination.

Purpose of the Study:

  • To investigate adaptive sensory sampling strategies in healthy aging during complex motor tasks.
  • To examine how healthy aging influences gaze allocation during object interception.
  • To test the hypothesis that older adults rely more on predictive gaze allocation.

Main Methods:

  • Compared gaze allocation and movement initiation in younger (20-34 yr) and older adults (>55 yr) intercepting a moving target.
  • Used tasks with varying spatial certainty (disk vs. arc) and target path predictability (predictable vs. unpredictable).
  • Measured interception performance, movement initiation timing, and saccade patterns (timing and fixation duration).

Main Results:

  • Older adults initiated movements earlier but achieved comparable interception performance to younger adults.
  • Older adults exhibited earlier predictive saccades toward interception zones and longer fixations, especially with high spatial certainty.
  • No direct relationship was found between gaze allocation patterns and interception performance.

Conclusions:

  • Healthy aging is associated with adaptive gaze allocation strategies during spatiotemporal constrained motor tasks.
  • Older adults' predictive gaze shifts may compensate for age-related sensorimotor limitations, optimizing visual information acquisition.
  • Gaze allocation is adaptable in aging, enabling maintenance of high motor performance despite functional declines.