title: Electrophysiological evidence that inhibition supports lexical selection in picture naming.
abstract: We investigated the neural basis of inhibitory control during lexical selection. Participants overtly named pictures while response times (RTs) and event-related brain potentials (ERPs) were recorded. The difficulty of lexical selection was manipulated by using object and action pictures with high name agreement (few response candidates) versus low name agreement (many response candidates). To assess the involvement of inhibition, we conducted delta plot analyses of naming RTs and examined the N2 component of the ERP. We found longer mean naming RTs and a larger N2 amplitude in the low relative to the high name agreement condition. For action naming we found a negative correlation between the slopes of the slowest delta segment and the difference in N2 amplitude between the low and high name agreement conditions. The converging behavioral and electrophysiological evidence suggests that selective inhibition is engaged to reduce competition during lexical selection in picture naming.
authors.affiliation: Max Planck Institute for Psycholinguistics, PO Box 310, 6500 AH Nijmegen, The Netherlands. Electronic address: Zeshu.Shao@mpi.nl.
authors.forename: Zeshu
authors.initials: Z
authors.lastname: Shao
authors.affiliation: Max Planck Institute for Psycholinguistics, PO Box 310, 6500 AH Nijmegen, The Netherlands; Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands.
authors.forename: Ardi
authors.initials: A
authors.lastname: Roelofs
authors.affiliation: Max Planck Institute for Psycholinguistics, PO Box 310, 6500 AH Nijmegen, The Netherlands; Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Acheson
authors.affiliation: Max Planck Institute for Psycholinguistics, PO Box 310, 6500 AH Nijmegen, The Netherlands; Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands.
authors.forename: Antje S
authors.initials: AS
authors.lastname: Meyer
mesh_terms: D000328:Adult; D001931:Brain Mapping; D002755:Choice Behavior / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D007266:Inhibition, Psychological; D008297:Male; D009275:Names; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology; D012660:Semantics; D014705:Verbal Behavior / Q000502:physiology; D055815:Young Adult
keywords: Delta plot; Inhibition; Lexical selection; N2; Picture naming