title: ERP evidence for hemispheric asymmetries in abstract but not exemplar-specific repetition priming.
abstract: Implicit memory retrieval is thought to be exemplar-specific in the right hemisphere (RH) but abstract in the left hemisphere (LH). Yet, conflicting behavioral priming results illustrate that the level at which asymmetries take effect is difficult to pinpoint. In the present divided visual field experiment, we tried to address this issue by analyzing ERPs in addition to behavioral measures. Participants made a natural/artificial decision on lateralized visual objects that were either new, identical repetitions, or different exemplars of studied items. Hemispheric asymmetries did not emerge in either behavioral or late positive complex (LPC) priming effects, but did affect the process of implicit memory retrieval proper as indexed by an early frontal negativity (N350/(F)N400). Whereas exemplar-specific N350/(F)N400 priming effects emerged irrespective of presentation side, abstract implicit memory retrieval of different exemplars was contingent on right visual field presentation and the ensuing initial stimulus processing by the LH.
authors.affiliation: Aging Research Group, Leibniz Research Centre for Working Environment and Human Factors, Dortmund, Germany.|Brain & Cognition Group, Department of Psychology, Saarland University, Saarbrücken, Germany.
authors.forename: Kristina
authors.initials: K
authors.lastname: Küper
authors.affiliation: Brain & Cognition Group, Department of Psychology, Saarland University, Saarbrücken, Germany.|International Research Training Group Adaptive Minds, Saarland University, Saarbrücken, Germany.|Department of Psychology, Ludwig Maximilian University of Munich, Munich, Germany.
authors.forename: Anna M
authors.initials: AM
authors.lastname: Liesefeld
authors.affiliation: Brain & Cognition Group, Department of Psychology, Saarland University, Saarbrücken, Germany.|International Research Training Group Adaptive Minds, Saarland University, Saarbrücken, Germany.
authors.forename: Hubert D
authors.initials: HD
authors.lastname: Zimmer
mesh_terms: D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D003657:Decision Making / Q000502:physiology; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology; D060865:Repetition Priming / Q000502:physiology*; D014794:Visual Fields / Q000502:physiology*; D055815:Young Adult
keywords: Cognition; EEG; Learning