Listener characteristics modulate the semantic processing of native vs. foreign-accented speech

Area of Science:

• Cognitive Science
• Psycholinguistics
• Neuroscience

Background:

• Foreign accents impact language processing, but their effect on semantic processing, particularly the N400 component, remains unclear.
• Previous studies yielded conflicting results and examined limited N400 characteristics in uncommon foreign-accented environments.

Purpose of the Study:

• To compare the N400 effect elicited by semantic violations in native Australian English versus Mandarin-accented English.
• To investigate factors contributing to individual variability in N400 amplitude, including familiarity and working memory capacity.

Main Methods:

• Event-related potential (ERP) study comparing N400 effects for semantic violations in native and Mandarin-accented English.
• Analysis of N400 characteristics (onset latency, latency, amplitude, scalp distribution).
• Investigation of individual factors like familiarity with foreign accents and working memory capacity.

Main Results:

• No significant differences were found in N400 characteristics between native and foreign-accented speech.
• Listener familiarity with foreign-accented speech positively correlated with N400 effect amplitude.
• Working memory capacity also influenced N400 amplitude.

Conclusions:

• The ambient linguistic environment is crucial for speech processing research.
• Individual listener factors, such as familiarity and working memory, interact with speaker characteristics in semantic processing.