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Executive control in the Simon effect: an electromyographic and distributional analysis
Borís Burle1, Camille-Aimé Possamaï, Franck Vidal
1Centre National de la Recherche Scientifique and Université de Provence, Laboratoire de Neurobiologie de la Cognition, Marseille, France. burle@psy.uva.nl
Psychological Research
|December 6, 2002
Summary
Cognitive control adjusts during a trial, enhancing executive functions when errors are nearly made. This study used electromyography to show real-time adjustments in response execution based on stimulus-response associations.
Area of Science:
- Cognitive psychology
- Neuroscience
- Human motor control
Background:
- Stimulus-response associations influence manual response times.
- This spatial congruence effect diminishes with longer reaction times.
- This decrease may indicate online executive control adjustments within a trial.
Purpose of the Study:
- To investigate the hypothesis that within-trial executive control modulates the spatial congruence effect.
- To analyze electromyographic (EMG) activity during response execution to detect online control mechanisms.
- To examine reaction time distributions and muscle activation patterns.
Main Methods:
- Electromyographic (EMG) recordings of muscles involved in response execution.
- Analysis of trials with dual muscle activation (preceding incorrect response).
- Sequential effect analysis and reaction time distribution analysis.
Main Results:
- Dual-activation trials led to reinforced executive control in subsequent trials.
- Analysis revealed online, within-trial changes in executive control.
- Evidence suggests the effect of irrelevant stimulus location is not solely motor-based.
Conclusions:
- Executive control dynamically adjusts within a single trial.
- These findings support models of cognitive control that incorporate online, within-trial adjustments.
- The study provides insights into the neural mechanisms underlying cognitive control and response selection.