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Does subliminal visual perception have an error-monitoring system?
Enea Francesco Pavone1, Carlo Alberto Marzi, Massimo Girelli
1Department of Neurological and Vision Sciences, Section of Physiology, University of Verona, Strada Le Grazie 8, Verona, Italy.
The European Journal of Neuroscience
|October 1, 2009
Summary
Unconscious vision can influence behavior by engaging the brain's error-monitoring system. This system, indicated by error-related negativity, functions even with stimuli not consciously perceived.
Area of Science:
- Cognitive Neuroscience
- Neuroscience
- Psychology
Background:
- Subliminal stimuli, imperceptible consciously, demonstrably influence human behavior.
- Further research is needed on the neural underpinnings and functional capacity of unconscious stimulus processing.
Purpose of the Study:
- To investigate whether unconscious vision can activate the brain's error-monitoring system.
- To determine if unconscious errors elicit the error-related negativity (ERN) component.
Main Methods:
- Participants performed a discrimination task with both visible and subthreshold (unconscious) stimuli.
- Event-related potentials (ERPs) were recorded to measure the error-related negativity (ERN).
- Behavioral data, including reaction times and post-error adjustments, were analyzed.
Main Results:
- Error-related negativity (ERN) was observed for errors made with both conscious and unconscious stimuli.
- Behavioral analysis revealed post-error slowing of reaction time following both conscious and unconscious errors.
- These findings indicate that the error-monitoring system operates irrespective of conscious awareness.
Conclusions:
- The error-monitoring system is sensitive to errors even when the stimuli are processed unconsciously.
- Both electrophysiological and behavioral evidence support the operation of an error-monitoring system during unconscious processing.
- This suggests a more profound role for unconscious vision in cognitive control than previously understood.
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