Neurophysiologic Patterns of Semantic Processing of Accented Speech

Ilse Wambacq, Iyad Ghanim, Samantha Greenfield, Janet Koehnke, Joan Besing, Caitlin Chauvette, Caitlin Yesis

Research output: Contribution to journalArticlepeer-review


Perceiving and comprehending speech depends on the intelligibility of the speech signal. Frequently, communication occurs with adverse listening conditions including background noise or reverberation which compromise the intelligibility of the speech signal. Studies focused on the effects of these extrinsic degrading factors on the perception of a message after it has been produced. Fewer studies, however, explored the effect of a non-native accent on speech perception and comprehension (Anderson-Hsieh et al., 1992; Munro & Derwing, 1995; van Wijngaarden et al., 2002). Objective: This study determines the effects of speech from a non-native speaker of English on semantic processing as it occurs in speech perception. Design: Individuals made judgements about semantically congruent or incongruent sentences spoken by native or non-native accented speakers while we assessed processing of semantic information using behavioral and neurophysiological (ERP) responses. Study sample: Two groups of 12 individuals between 20 and 30 years of age participated in this study. Results: The results revealed a later N400 in response to a non-native accent. Conclusions: N400 effect results indicated that, compared to a native accent, listening to non-native accent increases semantic processing difficulty, even with relevant semantic context.

Original languageEnglish
Article number101117
JournalJournal of Neurolinguistics
StatePublished - Feb 2023


  • Event-related potentials
  • N400
  • Non-native accent
  • Semantic processing
  • Speech perception


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