title: Prediction errors in self- and externally-generated deviants.
abstract: Sounds generated by one's own action elicit attenuated brain responses compared to brain responses to identical sounds that are externally-generated. The present study tested whether the suppression effect indexed by the N1- and P2-components of the event-related potential (ERP) is larger when self-generated sounds are correctly predicted than when they are not. Furthermore, sounds violating a prediction lead to a particular prediction error signal (i.e., N2b, P3a). Thus, we tested whether these error signals increase for self-generated sounds (i.e., enhanced N2b, P3a). We compared ERPs elicited by self- and externally-generated sounds that were of frequent standard and of infrequent deviant pitch. The results confirmed an N1- and P2-suppression effect elicited by self-generated standard sounds. The N1-suppression was smaller in response to self-initiated deviant sounds, indicating the specificity of predictions for self-generated sounds. In addition, an enhancement of N2b and P3a for self-generated deviants revealed the saliency of prediction error signals.
authors.affiliation: Research Group Subcortical Contributions to Comprehension, Dept of Neuropsychology, Max Planck Institute of Human Cognition and Brain Science, Leipzig, Germany. fknolle@cbs.mpg.de
authors.forename: Franziska
authors.initials: F
authors.lastname: Knolle
authors.forename: Erich
authors.initials: E
authors.lastname: Schröger
authors.forename: Sonja A
authors.initials: SA
authors.lastname: Kotz
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D009042:Motivation / Q000502:physiology*; D009043:Motor Activity / Q000502:physiology*; D011237:Predictive Value of Tests; D011930:Reaction Time; D013016:Sound; D055815:Young Adult