title: Brain correlates of self-rated originality of ideas: evidence from event-related power and phase-locking changes in the EEG.
abstract: In the present study, we contrast oscillatory brain activity during the production of subjectively more versus less original ideas. A sample of 26 participants worked on two verbal creativity problems and subsequently rated the produced ideas with respect to their originality. On the basis of these self-ratings, ideas were divided into a more and a less original list within each participant. Cortical activity was assessed by means of event-related changes in EEG power (synchronization and desynchronization) and phase locking in two alpha bands. Analyses revealed that more, as compared with less, original ideas elicited a stronger event-related synchronization of alpha activity (power increases from the pre-stimulus reference to the activation interval) and higher phase coupling in the right hemisphere. These findings corroborate the importance of right-hemispheric cortical networks in creative idea generation.
authors.affiliation: Institute of Psychology, University of Graz, Graz, Austria. ro.grabner@uni-graz.at
authors.forename: Roland H
authors.initials: RH
authors.lastname: Grabner
authors.forename: Andreas
authors.initials: A
authors.lastname: Fink
authors.forename: Aljoscha C
authors.initials: AC
authors.lastname: Neubauer
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D003405:Creativity; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008875:Middle Aged; D012647:Self-Assessment; D013057:Spectrum Analysis