Strategic control and medial frontal negativity: Beyond errors and response conflict
DOI: 10.1111/j.1469-8986.2005.00258.x
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Summary
This study investigates the neural mechanisms underlying strategic control and response monitoring, specifically examining whether the correct response negativity (CRN) reflects only response conflict or also the evaluation of processing strategies. Previous models, such as the conflict-monitoring theory, posit that the anterior cingulate cortex detects conflict between competing responses, generating the CRN on high-conflict trials. However, these models struggle to explain CRN occurrences on low-conflict trials where participants are certain of their response. The authors hypothesize that the CRN may instead reflect a mismatch between the adopted processing strategy and the actual trial conditions, regardless of whether response conflict is present. To test this, 42 participants performed an Eriksen flanker task while event-related potentials (ERPs) were recorded. The experimental design manipulated both stimulus compatibility (compatible vs. incompatible flankers) and the probability of compatible trials across three blocks: expect-compatible (80% compatible), expect-neutral (50% compatible), and expect-incompatible (20% compatible). This design allowed the researchers to dissociate the effects of response conflict from strategic adjustments, as participants were expected to adopt a "parallel" processing mode in expect-compatible blocks and a "focused" mode in expect-incompatible blocks. Behavioral performance and ERP components, including the CRN, error-related negativity (ERN), and stimulus-related N2, were analyzed. The results demonstrated that strategic control significantly modulated the CRN. Contrary to predictions that CRN would only appear on high-conflict trials, the CRN amplitude increased on low-conflict (compatible) trials when they occurred in the expect-incompatible context. This indicates that implementing an inappropriate strategy (focused processing) on a compatible trial elicited a CRN, even in the absence of response conflict. Furthermore, the CRN was larger on high-conflict trials in the expect-compatible condition, where a parallel strategy was inappropriately applied. In contrast, the stimulus-related N2, traditionally associated with conflict detection, was largest on high-conflict trials and was most pronounced for highly probable stimuli, suggesting it reflects different processes than the CRN. Behavioral data confirmed that participants adjusted their reaction times and error rates based on expectancy, validating the strategic manipulation. These findings challenge existing models that attribute the CRN solely to response conflict or error detection. Instead, the results support a broader view of the CRN as an index of strategic control, reflecting the evaluation of whether the selected processing strategy is appropriate for the current trial. The study suggests that the anterior cingulate cortex monitors not just response conflict but also the alignment between strategic plans and task demands. This implies that response-related negativities serve a dual function: detecting conflict between responses and evaluating the efficacy of the cognitive strategies employed to generate those responses.
Key finding
Correct response negativity amplitude increases on low-conflict trials when an inappropriate processing strategy is employed, indicating that strategic control influences response-related brain activity beyond mere response conflict.
Methodology
lab_experiment
Sample size: 42
Provenance
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
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| verify | success | — | — | — | 2 | 2026-06-10 |
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