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Related Experiment Video

Updated: Dec 29, 2025

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Enumeration strategy differences revealed by saccade-terminated eye tracking.

Jacob M Paul¹, Robert A Reeve¹, Jason D Forte¹

¹Melbourne School of Psychological Sciences, University of Melbourne, 3010, Victoria, Australia.

|February 5, 2020

Summary

This summary is machine-generated.

Eye movement patterns during number estimation are strategic. A novel saccade-terminated trial design improved enumeration accuracy by controlling eye movements, revealing links between visual attention and number acuity.

Keywords:

Enumeration Eye tracking Numerosity Saccade-terminated Saliency Strategy

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Last Updated: Dec 29, 2025

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Area of Science:

Cognitive Neuroscience
Visual Perception
Computational Modeling

Background:

Saccadic eye movements and numerical cognition share overlapping neural networks.
Eye movement patterns may reflect strategic scanning for efficient visual array enumeration.
Individual differences in enumeration acuity might be explained by visual attention mechanisms.

Purpose of the Study:

To investigate the role of eye movement patterns in visual enumeration strategies.
To systematically probe the time course of enumeration by manipulating trial termination based on saccades.
To validate a novel saccade-contingent trial termination procedure.

Main Methods:

Fifteen adults enumerated random dot arrays under three conditions: saccade-terminated, duration-terminated, and response-terminated trials.
The saccade-terminated design limited array visibility to one, two, or four saccades.
Eye movement patterns, including saccade onset latencies and trajectories, were analyzed.

Main Results:

Participants achieved higher enumeration accuracy in saccade-terminated trials compared to duration-terminated trials, with similar trial durations.
Informed participants adjusted saccade onset latencies to meet task demands.
Saccade vector orientation correlated with salient image locations, indicating stimulus-driven adjustments.

Conclusions:

Both stimulus-driven visual processing and strategic task demands influence enumeration eye movement patterns.
The saccade-contingent trial termination method is a valid tool for studying enumeration eye movements.
Future models of visual enumeration should incorporate spatial and temporal eye movement analyses.