Auditory Predictions and Prediction Errors in Response to Self-Initiated Vowels

Franziska Knolle, Michael Schwartze, Erich Schroeger, Sonja A. Kotz

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

It has been suggested that speech production is accomplished by an internal forward model, reducing processing activity directed to self-produced speech in the auditory cortex. The current study uses an established N1-suppression paradigm comparing self- and externally initiated natural speech sounds to answer two questions: (1) Are forward predictions generated to process complex speech sounds, such as vowels, initiated via a button press? (2) Are prediction errors regarding self-initiated deviant vowels reflected in the corresponding ERP components? Results confirm an N1-suppression in response to self-initiated speech sounds. Furthermore, our results suggest that predictions leading to the N1-suppression effect are specific, as self-initiated deviant vowels do not elicit an N1-suppression effect. Rather, self-initiated deviant vowels elicit an enhanced N2b and P3a compared to externally generated deviants, externally generated standard, or self-initiated standards, again confirming prediction specificity. Results show that prediction errors are salient in self-initiated auditory speech sounds, which may lead to more efficient error correction in speech production.
Original languageEnglish
Article number1146
Number of pages11
JournalFrontiers in Neuroscience
Volume13
DOIs
Publication statusPublished - 25 Oct 2019

Keywords

  • N1 attenuation
  • self-generated speech
  • vowels
  • novelty
  • forward prediction
  • prediction error
  • COROLLARY DISCHARGE DYSFUNCTION
  • SPEECH PRODUCTION
  • CORTEX
  • VOICE
  • FEEDBACK
  • SUPPRESSION
  • BRAIN
  • ERP
  • SCHIZOPHRENIA
  • VOCALIZATION

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