Language switching across modalities: Evidence from bimodal bilinguals

Area of Science:

• Psycholinguistics
• Cognitive Neuroscience
• Bilingualism Research

Background:

• Bilingual language control mechanisms are extensively studied in unimodal bilinguals.
• The generalization of language control across different modalities (e.g., spoken vs. signed) remains less understood.
• Investigating modality effects provides insights into the universality of language control systems.

Purpose of the Study:

• To determine if language control in bilinguals generalizes across spoken and signed modalities.
• To assess the role of articulatory competition in shaping the language control system.
• To compare language switching costs in bimodal bilinguals with existing findings in unimodal bilinguals.

Main Methods:

• Employed a cued language-switching paradigm with bimodal bilingual participants.
• Measured reaction times (RT) and accuracy during transitions between spoken and signed language production.
• Analyzed switch costs to identify differences in language selection efficiency.

Main Results:

• Observed asymmetrical switch costs in bimodal bilinguals for both RT and accuracy.
• Identified larger switch costs when participants produced the dominant spoken language compared to the signed language.
• Demonstrated that modality does not prevent language control, but influences its efficiency.

Conclusions:

• Language control mechanisms in bimodal bilinguals share similarities with unimodal bilinguals.
• Competition in language selection appears to operate at multiple levels, not solely at the phonological/articulatory level.
• Findings support a more generalized model of language control that accommodates cross-modal switching.