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Related Experiment Video

Updated: Nov 9, 2025

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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Microsaccades and covert attention: Evidence from a continuous, divided attention task.

Aimee E Ryan1, Brendan Keane1, Guy Wallis1

  • 1Centre for Sensorimotor Performance, University of Queensland, Australia.

Journal of Eye Movement Research
|April 8, 2021
PubMed
Summary

Microscopic eye movements, or microsaccades, may track spatial attention during continuous tasks. This research suggests microsaccade direction correlates with the side of space participants responded to, offering insights into expert behavior.

Keywords:
Microsaccadesattentioncovert attentiondivided-attentioneye movementseye trackingvisual attention

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Area of Science:

  • Cognitive Neuroscience
  • Human Factors Engineering
  • Ophthalmology

Background:

  • Understanding expert behavior requires knowing where experts direct their attention.
  • Gaze tracking is limited by covert attention, the ability to attend to areas outside fixation.
  • Microsaccades, small eye movements during fixation, may reflect covert spatial attention.

Purpose of the Study:

  • To investigate the link between microsaccades and spatial attention in a continuous, divided-attention task.
  • To bridge the gap between controlled lab studies and real-world ecological tasks.
  • To examine microsaccade-response relationships in a more naturalistic setting.

Main Methods:

  • Participants performed a continuous, divided-attention task.
  • Eye movements, specifically microsaccades, and response data were recorded.
  • Analysis focused on the relationship between microsaccade direction and response behavior before and after the movement.

Main Results:

  • No significant link was found between task accuracy and microsaccade direction.
  • A significant time-locked relationship emerged between the side of space responded to and the direction of the preceding microsaccade.
  • This suggests microsaccades may dynamically track the allocation of spatial attention.

Conclusions:

  • Microsaccades show potential as a tool to study the dynamics of spatial attention.
  • Findings support the hypothesis that microsaccades are linked to covert attentional shifts.
  • This research advances understanding of expert visual processing in ecologically relevant tasks.