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A Method to Quantify Visual Information Processing in Children Using Eye Tracking
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Visual information is required to reduce the global effect.

Kiki Arkesteijn1,2, Mieke Donk3, Jeroen B J Smeets4

  • 1Department of Experimental and Applied Psychology, Vrije Universiteit Amsterdam, Van der Boechorststraat 7, 1081 BT, Amsterdam, Netherlands. arkesteijn.kiki@gmail.com.

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The global effect, which biases saccades towards distractors, does not decrease with latency in memory-guided saccades. Continuous visual information is necessary to reduce this effect.

Keywords:
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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Ophthalmology

Background:

  • The global effect biases saccadic eye movements towards distractors near targets.
  • This effect typically reduces with saccade latency in visually guided movements.
  • Previous research indicated this reduction is absent in memory-guided saccades.

Purpose of the Study:

  • Investigate the reasons behind the lack of global effect reduction in memory-guided saccades.
  • Determine if continuous visual information is essential for reducing the global effect.
  • Differentiate between lack of visual access and premature saccade preprogramming as causes.

Main Methods:

  • Compared the global effect in memory-guided saccades under different cueing conditions (pre-cue vs. retro-cue).
  • Manipulated visual exposure duration of targets and distractors.
  • Measured saccadic endpoint deviations in response to distractor proximity.

Main Results:

  • The global effect persisted regardless of whether saccades could be preprogrammed (pre-cue) or were guided by later information (retro-cue).
  • Increased visual exposure of targets and distractors reduced the global effect.
  • This reduction occurred irrespective of saccade preprogramming possibility.

Conclusions:

  • Continuous access to visual information is crucial for eliminating the global effect.
  • Premature saccade preprogramming is not the primary reason for the persistent global effect in memory-guided saccades.
  • Visual guidance, not just timing, plays a key role in modulating saccadic behavior.