title: Complementary modulation of N2 and CRN by conflict frequency.
abstract: The present study investigated the modulation of the N2 and the correct-related negativity (CRN) by conflict frequency. Conflict costs, as measured by reaction times and error rate, were reduced with increasing conflict frequency, indicating improved conflict resolution. N2 amplitudes in incompatible trials increased with higher conflict frequency, while postresponse CRN amplitudes decreased. In concert with behavioral findings of reduced conflict costs and greater interference suppression, the increase of N2 might reflect enhanced conflict resolution during stimulus processing. The CRN, however, might reflect postresponse implementation of cognitive control, which is reduced when conflict is already adequately resolved during stimulus processing. Furthermore, N2 and CRN in incompatible trials were inversely related on the between- and within-subject level, implying that the two modes of implementing cognitive control are applied complementarily.
authors.affiliation: Clinical Psychology, Humboldt-Universität zu Berlin, Berlin, Germany.
authors.forename: Rosa
authors.initials: R
authors.lastname: Grützmann
authors.forename: Anja
authors.initials: A
authors.lastname: Riesel
authors.forename: Julia
authors.initials: J
authors.lastname: Klawohn
authors.forename: Norbert
authors.initials: N
authors.lastname: Kathmann
authors.forename: Tanja
authors.initials: T
authors.lastname: Endrass
mesh_terms: D000328:Adult; D001921:Brain / Q000502:physiology*; D003220:Conflict, Psychological; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D055815:Young Adult
keywords: CRN; Cognitive control; Conflict; ERN; N2; Performance monitoring