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Psychophysiology. 2012 Jun;49(6):756-69. doi: 10.1111/j.1469-8986.2012.01368.x. Epub 2012 Apr 23.

Proactive and reactive control in S-R compatibility: a brain potential analysis.

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  • 1Department of Psychology, Tilburg University, Tilburg, The Netherlands.


We investigated how proactive and reactive control facilitates performance in mixed stimulus-response compatibility (SRC) tasks. SRC effects were eliminated in mixed tasks and reversed following incompatible trials. In mixed tasks, early preferential response activation was present in stimulus-locked lateralized readiness potentials (LRPs) but reduced following incompatible trials. In event-related potentials (ERPs), stimulus-locked N2 was enhanced in all mixed trials but was not significantly influenced by the preceding trial. A response-locked fronto-central negative component (N-120), peaking just before the response, was largest for mixed compatible trials preceded by incompatible trials. This N-120 was paired with an enhancement to the peak of the response-locked LRP. Proactive control is involved in selection of an S-R mapping via the indirect route of a dual-route model. Reactive control corrects the S-R mapping, particularly when alternating between S-R mappings.

Copyright © 2012 Society for Psychophysiological Research.

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