Time course of inhibitory processes in bilingual language processing

Area of Science:

• Psycholinguistics
• Cognitive Neuroscience

Background:

• Bilingual language processing involves managing multiple languages.
• Understanding inhibitory control is crucial for explaining bilingual cognition.

Purpose of the Study:

• To investigate the temporal dynamics of inhibitory processes in Spanish-English bilinguals.
• To determine if irrelevant meanings of interlingual homographs are actively inhibited.

Main Methods:

• Participants performed a word relatedness judgment task with English word pairs.
• Stimuli included interlingual homographs (e.g., 'pie') with shared orthography but different meanings across Spanish and English.
• Response times were measured under different inter-trial intervals (500 ms and 750 ms).

Main Results:

• Bilinguals showed slower responses to homographs when primed with their Spanish meaning, indicating non-selective language activation.
• Inhibition of the irrelevant Spanish meaning was observed at a 500 ms inter-trial interval.
• This inhibitory effect diminished at a 750 ms inter-trial interval, suggesting decay over time.

Conclusions:

• Bilinguals demonstrate non-selective activation of both languages during processing.
• Active inhibition is employed to suppress irrelevant language meanings.
• The effectiveness of inhibitory control is time-dependent, with effects decaying over time.