Recent research suggests bilingual learners’ brains “work harder” to process lessons in a second language. A study involving adolescent bilinguals shows they engage distinct brain networks compared to monolinguals during naturalistic learning, particularly when lessons are delivered in their second language (L2).
38 Spanish-English bilinguals & English monolinguals watched a science video lesson & their brain activity was monitored using fMRI. The results shed light on how bilingual students navigate learning in a non-native language.
Key Findings:
- Wider Connectivity in Bilinguals: Bilingual students displayed more extensive, bilateral brain activity, engaging both hemispheres & regions tied to cognitive control (e.g., anterior cingulate cortex & basal ganglia), especially when processing complex material in their L2. In contrast, monolinguals showed more localized, left-lateralized brain activity focused on core language areas.
- Comprehension Gaps: On average, English monolinguals scored 15 percentage points higher on the video comprehension task compared to bilinguals. This gap reflects the additional cognitive load bilingual learners face when processing lessons in a non-dominant language.
- Language Proficiency Matters: Higher proficiency in either language was linked to more efficient brain processing. For example, better Spanish reading comprehension correlated with stronger connectivity in language-related brain areas during the English lesson, suggesting that strong L1 skills can support L2 learning.
Teacher Takeaways?
Although the study wasn’t specifically concerned with L2 acquisition it seems to support a systematic approach to classroom activities.
This “extra work” our brains need to engage in can lead to increased cognitive load, which may slow down comprehension or make learning more taxing. Which means that strategies like scaffolding, leveraging L1 skills, & reducing the complexity of L2 input can be beneficial in helping learners learn more effectively.
Do you ever include L1 resources or strategies in your lessons to support bilingual learners?
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