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Optokinetic stimulation affects temporal estimation in healthy humans.
Carmelo Mario Vicario1, Carlo Caltagirone, Massimiliano Oliveri
1Dipartimento di Psicologia, Università degli Studi di Palermo, Viale delle Scienze, Edificio 15, 90100 Palermo, Italy.
Brain and Cognition
|April 3, 2007
Summary
Optokinetic stimulation, a visual stimulus, alters how people perceive time. Rightward stimulation led to overestimating time, suggesting a link between spatial attention and time perception.
Area of Science:
- Cognitive Neuroscience
- Psychophysics
Background:
- Time and space representations are interconnected in cognitive systems.
- Optokinetic stimulation influences spatial attention in various populations.
Purpose of the Study:
- To investigate if optokinetic stimulation affects time perception.
- To determine if the direction of optokinetic stimulation induces a directional bias in time perception.
Main Methods:
- Healthy subjects performed time-comparison tasks involving sub- and supra-second intervals.
- Tasks were conducted before and after leftward or rightward optokinetic stimulation.
Main Results:
- Subjective time perception was significantly biased by the direction of optokinetic stimulation.
- Rightward optokinetic stimulation resulted in an overestimation of time compared to baseline and leftward stimulation.
Conclusions:
- Optokinetic stimulation induces a directional bias in time perception.
- Findings support a model of a mentally linear representation of time intervals influenced by spatial attention.
