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Related Experiment Video

Updated: Apr 15, 2026

Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
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Processing changes when listening to foreign-accented speech.

Carlos Romero-Rivas1, Clara D Martin2, Albert Costa3

  • 1Speech Production and Bilingualism, Center for Brain and Cognition, Universitat Pompeu Fabra Barcelona, Spain.

Frontiers in Human Neuroscience
|April 11, 2015
PubMed
Summary
This summary is machine-generated.

Native Spanish speakers adapt to foreign-accented speech by engaging higher-level processing, even without improving phonetic discrimination. This demonstrates that lexical access and semantic integration are influenced by speaker accent.

Keywords:
ERPsN400P200P600adaptationforeign-accented speechlexical-semantic processingperceptual learning

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Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Auditory Processing

Background:

  • Understanding how the brain processes speech, particularly when encountering variations like foreign accents, is crucial for explaining human communication flexibility.
  • Previous research has explored phonetic adaptation but less is known about the underlying neural mechanisms and higher-level cognitive adjustments.

Purpose of the Study:

  • To investigate the neural mechanisms behind rapid adaptation to foreign-accented speech.
  • To examine how native listeners' brain activity changes when processing accented versus native speech.
  • To determine if adaptation occurs at phonetic, lexical, or semantic levels.

Main Methods:

  • Event-Related Potentials (ERPs) were recorded from native Spanish speakers listening to Spanish spoken with native and foreign accents.
  • Participants were exposed to accented speech throughout the experiment.
  • Semantic violations were introduced in critical words to elicit specific ERP components.

Main Results:

  • A reduced P200 component for foreign-accented speech indicated difficulties in acoustic feature extraction.
  • A decreasing N400 amplitude for foreign-accented speech suggested the engagement of lexical processing mechanisms.
  • Semantic violations elicited an N400 effect followed by late positivity for native speech, but only an N400 effect for foreign-accented speech.

Conclusions:

  • Native listeners adapt to foreign-accented speech at lexical-semantic levels, despite no improvement in phonetic discrimination.
  • Brief exposure to foreign accents can alter speech processing, impacting lexical access, semantic integration, and linguistic re-analysis.
  • These findings highlight the dynamic and adaptable nature of the human speech processing system, influenced by external factors like speaker accent.