ERP correlates of a receptive language-switching task

Area of Science:

• Cognitive Neuroscience
• Psycholinguistics
• Bilingualism Research

Background:

• Bilingual speakers exhibit significant response time costs when switching between languages in productive tasks.
• Previous event-related potential (ERP) studies linked productive language switching to frontal and parietal brain activity.
• Language switching involves both language representations and motor response adjustments.

Purpose of the Study:

• To investigate language switching costs in a receptive task (parity judgment of number words).
• To examine the neural correlates of receptive language switching using ERPs.
• To explore the locus of language switching costs in bilingual individuals.

Main Methods:

• Participants performed a parity judgment task on number words presented in their first (L1) and second (L2) languages.
• Response times and event-related potentials (ERPs) were recorded.
• A within-language control condition was used for comparison.

Main Results:

• Receptive language switching showed considerably reduced response costs compared to productive switching.
• ERP analysis revealed early, non-language-specific activity over central sensors during receptive switching.
• The frontal and parietal activity observed in productive switching tasks was absent in the receptive task.

Conclusions:

• Receptive language switching costs are significantly lower than those in productive switching.
• The neural mechanisms underlying receptive language switching differ from those in productive switching.
• Findings challenge the notion of a language-specific lexical selection mechanism, suggesting switching costs may arise extralexically.