title: Neural mechanisms underlying conflict monitoring over risky decision alternatives: evidence from ERP in a Go/Nogo task.
abstract: This study assessed conflict monitoring during presentation of risky decision alternatives, as indexed by the Nogo-N2, Nogo-P3, N2d and P3d event-related potentials (ERP). Decision-makers were tested on a Go/Nogo gambling task in which gain/loss outcomes as well as stimulus type (Go/Nogo) were equiprobable. Frontal-central Nogo-N2 and Nogo-P3 did not significantly differ across risky decision alternatives, whereas N2d and P3d amplitudes were more sensitive to the nature of risky decision alternatives. Frontal-central N2d was moderated by the magnitude of alternatives, with N2d amplitude greater for large than small alternatives, a result that suggests a greater degree of conflict monitoring for the former. Central P3d was associated with alternative valence, such that P3d amplitude was greater for loss than gain valences, again suggestive of more conflict monitoring for the former. The N2d and P3d potentials in risky decision alternatives are discussed in terms of the functional significance of the N2/P3 complex.
authors.affiliation: Northwest University, Xi'an, P. R. China.
authors.forename: Shuzhen
authors.initials: S
authors.lastname: Wang
authors.forename: Ning
authors.initials: N
authors.lastname: Hui
authors.forename: Xinsheng
authors.initials: X
authors.lastname: Zhou
authors.forename: Kaifeng
authors.initials: K
authors.lastname: He
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Yu
authors.forename: Jing
authors.initials: J
authors.lastname: Shuai
mesh_terms: D000328:Adult; D001921:Brain / Q000502:physiology*; D003220:Conflict, Psychological; D003657:Decision Making / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials; D005260:Female; D005717:Games, Experimental; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D012309:Risk-Taking; D055815:Young Adult
keywords: N2/P3 complex; Nogo-N2; Nogo-P3; Risky decision alternatives; conflict monitoring