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Correlating Behavioral Responses to fMRI Signals from Human Prefrontal Cortex: Examining Cognitive Processes Using Task Analysis
Published on: June 20, 2012
Effects of response-set size on error-related brain activity
Martin E Maier1, Marco Steinhauser, Ronald Hübner
1Fachbereich Psychologie, Universität Konstanz, Fach D29, 78457, Constance, Germany. martin.maier@uni-konstanz.de
Experimental Brain Research
|January 23, 2010
Summary
Increasing the number of choices in a task impairs action monitoring, reducing the error-related negativity (Ne/ERN) and hindering post-error adjustments. This suggests response-set size negatively impacts cognitive control.
Area of Science:
- Cognitive Neuroscience
- Psychology
Background:
- Action monitoring is crucial for adaptive behavior.
- The error-related negativity (Ne/ERN) and correct-related negativity (Nc/CRN) are electrophysiological markers of action monitoring.
- Response-set size, the number of possible responses, may influence these processes.
Purpose of the Study:
- To investigate the impact of response-set size on action monitoring.
- To examine effects on Ne/ERN, Nc/CRN, and behavioral adjustments.
Main Methods:
- Participants performed flanker tasks with two, four, or eight response choices.
- Event-related potentials (ERPs) were analyzed, focusing on Ne/ERN and Nc/CRN.
- Behavioral data, including post-error adjustments, were recorded.
Main Results:
- Response-set size significantly affected Ne/ERN and Nc/CRN amplitudes.
- Ne/ERN amplitude decreased, while Nc/CRN amplitude increased with larger response sets.
- Post-error behavioral adjustments were impaired as response-set size increased.
Conclusions:
- Increased response-set size detrimentally affects action monitoring.
- Findings challenge existing theories of Ne/ERN and Nc/CRN by highlighting the role of response complexity.
