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Published on: July 16, 2015
Neural correlates of stimulus and response interference in a 2-1 mapping stroop task
Antao Chen1, Kira Bailey, Brandy N Tiernan
1School of Psychology, Southwest University, Beibei, Chongqing, China.
Summary
This study investigated stimulus and response interference in the Stroop task using event-related brain potentials (ERPs). Findings suggest distinct neural correlates for stimulus and response interference, implicating parietal and frontal regions in cognitive control.
Area of Science:
- Cognitive Neuroscience
- Psychophysiology
Background:
- The Stroop interference effect is attributed to stimulus and response interference.
- Neurophysiological evidence presents conflicting findings regarding the neural correlates of these interference types.
Purpose of the Study:
- To investigate the neural correlates of stimulus and response interference using a 2-1 mapping Stroop task.
- To differentiate the brain activity associated with stimulus versus response interference.
Main Methods:
- Employed a 2-1 mapping Stroop task.
- Utilized event-related brain potentials (ERPs) with stimulus- and response-locked analyses.
Main Results:
- Response interference magnitude increased with response time, unlike stimulus interference.
- Medial frontal negativity was sensitive to response interference, not stimulus interference.
- Conflict slow potential (SP) showed differential sensitivity across brain regions to both interference types.
Conclusions:
- The parietal region is crucial for response selection in the Stroop task.
- Lateral frontal regions are involved in response monitoring and conflict adaptation.
- Distinct neural processes underlie stimulus and response interference.
