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Multilingual Language Diversity Protects Native Language Production under Different Control Demands.

Keyi Kang1,2, Yumeng Xiao1, Hanxiang Yu1

  • 1Centre for Cognitive and Brain Sciences, University of Macau, Taipa, Macau SAR, China.

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Summary
This summary is machine-generated.

Multilingual individuals show decreased native language performance and increased brain activity under high control demands. However, diverse language use enhances accuracy and neural network efficiency, aiding task adaptation.

Keywords:
control demandsfMRIlanguage entropymultilingualismnative language production

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Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Neuroscience of Language

Background:

  • Multilingualism impacts cognitive abilities, but its effect on native language production, especially under control demands, is less understood.
  • Previous research primarily focused on non-native language proficiency, leaving a gap in understanding native language processing in multilinguals.
  • Quantifying multilingual experience through metrics like language entropy offers a novel approach to studying its cognitive consequences.

Purpose of the Study:

  • To investigate how multilingualism affects native language production under varying control demands.
  • To examine the relationship between language entropy (diversity of language use) and cognitive control in native language tasks.
  • To explore the neural correlates of control demands in multilingual native language production.

Main Methods:

  • A semantic Go/No-Go picture naming task was employed to assess native language production.
  • Control demands were manipulated by varying the proportion of Go trials across conditions.
  • Multilingual experience was quantified using language entropy, and behavioral and neuroimaging data were collected.

Main Results:

  • Increased control demands led to poorer behavioral performance and heightened brain activation in multilingual individuals.
  • Higher language entropy correlated with improved naming accuracy and more interconnected neural networks.
  • Multilinguals with varied and balanced language use demonstrated more efficient responses to increased task demands.

Conclusions:

  • Multilingualism presents a trade-off between executive control demands and native language production efficiency.
  • Diverse and balanced multilingual experience can enhance cognitive control and neural network flexibility, benefiting native language processing.
  • The findings highlight the adaptive nature of the multilingual brain in managing linguistic and cognitive demands.