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Related Experiment Video

Updated: Apr 24, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
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Oculomotor inhibitory control in express saccade makers.

Felicity D A Wolohan1, Paul C Knox

  • 1Department of Eye and Vision Science, Institute of Ageing and Chronic Disease, University of Liverpool, Thompson Yates Building, Liverpool, L69 3GB, UK, wolohan@liverpool.ac.uk.

Experimental Brain Research
|September 4, 2014
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Summary

Express saccade makers (ESMs) show more rapid, reflexive eye movements. Their performance deficits on antisaccade tasks are not due to general inhibitory control weaknesses.

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Area of Science:

  • Neuroscience
  • Oculomotor Control
  • Cognitive Psychology

Background:

  • Express saccade makers (ESMs) exhibit high rates of express saccades and errors on antisaccade (AS) tasks, suggesting impaired oculomotor inhibition.
  • The complexity of the AS task limits its ability to isolate inhibitory control deficits.

Purpose of the Study:

  • To investigate inhibitory control in ESMs using a minimally delayed oculomotor response (MDOR) task.
  • To determine if observed deficits in ESMs are attributable to general inhibitory control weaknesses.

Main Methods:

  • 25 ESM and 28 non-ESM (Norm) participants completed an MDOR task with varying target durations and a control task.
  • Inhibitory control was assessed by measuring saccade latency and error rates in response to target onset versus offset.

Main Results:

  • Saccade latency was significantly longer in the MDOR task and modulated by display time, but no group differences in overall inhibitory control were found.
  • Error rates were comparable between ESMs and Norms, though ESMs produced a higher proportion of errors within the express saccade latency range.
  • ESMs continued to show higher directional error rates on the AS task.

Conclusions:

  • The performance "deficit" in ESMs on the AS task is not explained by a general deficit in inhibitory control.
  • ESMs may have specific difficulties with inhibitory mechanisms rather than a broad impairment.
  • The MDOR task provides a sensitive measure of oculomotor inhibitory control, but express saccade production remains a distinguishing feature of ESMs.