AI Article Synopsis
- The study investigates how error-related brain activity (specifically ERP components) is influenced by the similarity between responses and stimuli in a controlled experiment.
- It builds on previous research, confirming that the similarity of the responses (not the stimuli) significantly affects the magnitude of the error-related negativity (ERN) component.
- The findings show that both the ERN and a related positive component are sensitive to the severity of errors, while other components like P300 and frontal negativity are not affected by response similarity.
Article Abstract
We report the results of an experiment designed to elucidate the extent to which the error related ERP components are affected by response and stimulus similarity. We examined the ERPs under varying degrees of mismatch between the representations of actual and appropriate responses. We replicated the design used in an earlier study, which demonstrated that response similarity rather than stimulus similarity affected the amplitude of the error related negativity (ERN). We report the results of a spatial-temporal principal component analysis (PCA), which indicates that response similarity affects the amplitudes of the ERN and the fronto-central positive component, but not those of the P300 and the frontal negativity. The results provide evidence to suggest that the ERN and the proceeding positive deflection are error related and are sensitive to the degree of the committed error, whereas the P300 and the frontal negativity are not.
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| http://dx.doi.org/10.1111/j.1469-8986.2011.01264.x | DOI Listing |
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