How bilinguals perceive speech depends on which language they think they're hearing

Area of Science:

• Psycholinguistics
• Cognitive Neuroscience
• Bilingualism Research

Background:

• Bilinguals exhibit context-dependent language switching in speech production.
• The capacity for conceptually-driven language selection in speech perception remains debated.
• Investigating whether bilinguals can perceptually adapt to language-specific pronunciations based on conceptual cues is crucial.

Purpose of the Study:

• To determine if bilingual listeners can perceptually adjust to language-specific phonetic variations based on conceptual cues.
• To test the hypothesis that conceptual understanding of language context influences speech perception in bilinguals.
• To provide evidence for or against conceptually-based language selection in the listening modality.

Main Methods:

• Recruited French-English and Spanish-English bilingual participants.
• Presented participants with nonsense monosyllables varying in /b/-/p/ phonetic features.
• Conceptually cued participants to specific language contexts (French, Spanish, or English) before speech perception tasks.

Main Results:

• Bilingual participants adjusted their /b/-/p/ phonetic boundary based on the cued language context.
• French-English bilinguals showed language-specific perceptual shifts.
• Spanish-English bilinguals demonstrated similar context-dependent perceptual adjustments.

Conclusions:

• Conceptual cues significantly influence bilinguals' speech perception, enabling language selection in listening.
• Findings support bilingual models that incorporate conceptual control over language processing in both production and perception.
• This study demonstrates that bilinguals can perceptually attune to language-specific phonetic details based on conceptual understanding.