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Related Experiment Video

Updated: Mar 30, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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Modulation of Saccade Vigor during Value-Based Decision Making.

Thomas R Reppert1, Karolina M Lempert2, Paul W Glimcher2

  • 1Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, and treppert@jhu.edu.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|November 21, 2015
PubMed
Summary

Eye movement vigor reflects subjective value during decision-making. As people deliberate, saccade vigor increases for their preferred option, revealing real-time valuation processes in the brain.

Keywords:
impulsivitymotor controlrewardsaccadetemporal discountingvigor

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Decision-Making

Background:

  • Value-based decision-making involves selecting options based on subjective value.
  • Eye movements (saccades) during deliberation may reflect this valuation process.
  • Saccade vigor, or peak velocity, is potentially influenced by associated rewards.

Purpose of the Study:

  • To investigate if saccade vigor during free viewing of options is influenced by their subjective valuation.
  • To determine if motor system activity (saccade vigor) reflects real-time value assignment during decision-making.

Main Methods:

  • Participants chose between immediate small and delayed larger monetary rewards.
  • Saccade vigor was measured during the deliberation period.
  • The relationship between saccade vigor and the difference in subjective values was analyzed.

Main Results:

  • Saccade vigor was initially similar for both options but diverged before decision time.
  • Vigor became greater for the preferred option as deliberation progressed.
  • The increase in vigor correlated with the difference in subjective values assigned to the options.

Conclusions:

  • Saccade vigor reflects real-time stimulus evaluation during decision-making.
  • Diverging saccade vigor indicates a shared neural network for value assignment and motor control.
  • Motor system activity provides insights into the subjective valuation process.