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Antisaccade costs with static and dynamic targets.

Richard Godijn1, Arthur F Kramer

  • 1Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA. godijn@uiuc.edu

Perception & Psychophysics
|October 13, 2007
PubMed
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The antisaccade cost, a measure of eye movement control, was higher for static than dynamic targets and for onset than offset targets. Target offset facilitated antisaccades, reducing this cost.

Area of Science:

  • Cognitive Neuroscience
  • Oculomotor Research
  • Human Factors

Background:

  • Antisaccade tasks assess inhibitory control and are crucial for understanding executive functions.
  • Antisaccade cost quantifies the difficulty of inhibiting a reflexive prosaccade towards a stimulus to generate a saccade away from it.

Purpose of the Study:

  • To investigate how target properties (static vs. dynamic, onset vs. offset) influence antisaccade cost during visual search.
  • To explore the role of attentional control and working memory in antisaccade generation.

Main Methods:

  • Participants performed visual search tasks requiring either prosaccades (saccades toward the target) or antisaccades (saccades away from the target).
  • Antisaccade cost was calculated as the latency difference between antisaccades and prosaccades.

Related Experiment Videos

  • Target stimuli varied in dynamism and presentation (onset/offset).

    • Main Results:

    • Antisaccade cost was significantly greater for static targets compared to dynamic targets.
    • Antisaccade cost was higher for onset targets than for offset targets.
    • The offset of an onset target interfered with prosaccades but facilitated antisaccades, reducing the overall antisaccade cost.

    Conclusions:

    • Target characteristics critically modulate oculomotor control in antisaccade tasks.
    • Attentional control and working memory are essential components for accurate antisaccade execution.
    • Findings contribute to models of executive control and visual attention.