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Updated: Jul 20, 2026
09:27
Eye Movements in Visual Duration Perception: Disentangling Stimulus from Time in Predecisional Processes
Published on: January 19, 2024
The time course of saccadic decision making: dynamic field theory
Claudia Wilimzig1, Stefan Schneider, Gregor Schöner
1Institut für Neuroinformatik, Ruhr-University of Bochum, Bochum, Germany.
Summary
This study models saccadic eye movement initiation and target selection, revealing how decision-making processes shift from spatial averaging to selection based on speed and fixation. The model explains the balance of neural processes underlying these choices.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Cognitive Science
Background:
- Saccadic eye movements involve distinct initiation and target selection processes.
- Decision-making instabilities underlie the temporal dynamics of these processes.
- Understanding the neural basis of these decisions is crucial for cognitive neuroscience.
Purpose of the Study:
- To provide a theoretical account for the time-courses of saccade initiation and target selection.
- To explain the shift from spatial averaging to selection based on saccade speed.
- To model the role of fixation in saccade initiation and its interaction with target selection.
Main Methods:
- Developed a theoretical model for saccadic decision-making processes.
- Modeled the countermanding paradigm to analyze saccade initiation and fixation.
- Investigated the influence of fixation stimuli on averaging-to-selection crossover using gap-step-overlap paradigms.
Main Results:
- Demonstrated how the balance between excitatory and inhibitory processes drives the shift from spatial averaging to selection.
- Modeled the temporal evolution and fixation dependence of suppression probability in saccade initiation.
- Predicted the impact of fixation stimuli on the averaging-to-selection crossover.
Conclusions:
- The model provides a unified account for saccadic decision-making dynamics.
- Activation dynamics may map onto neural structures like the superior colliculus.
- Highlights the interplay between saccade initiation, target selection, and fixation mechanisms.
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