The Neural Representation of Concepts in Bilinguals: an Evaluation of Factors Influencing Cross-language Overlap Using fMRI-based Multivariate Pattern Analysis

• Autores: Usman Ayub Sheikh
• Directores de la Tesis: Manuel Carreiras Valiña (dir. tes.), David Soto Blanco (dir. tes.)
• Lectura: En la Universidad del País Vasco - Euskal Herriko Unibertsitatea ( España ) en 2023
• Idioma: inglés
• Programa de doctorado: Programa de Doctorado en Neurociencia Cognitiva / Cognitive Neuroscience por la Universidad del País Vasco/Euskal Herriko Unibertsitatea
• Materias:
  • Lingüística
    • Lingüística aplicada
      • Bilingüismo
  • Psicología
    • Psicología experimental
      • Actividad cerebral
      • Procesos mentales
• Enlaces
  • Tesis en acceso abierto en: ADDI
• Resumen

  • The neurocognitive mechanisms that support the generalization of semantic representations across different languages remain to be determined. Current psycholinguistic models propose that semantic representations are likely to overlap across languages, although there is evidence also to the contrary. Neuroimaging studies observed that brain activity patterns associated with the meaning of words may be similar across languages. However, the factors that mediate cross-language generalization of semantic representations are not known. In a series of functional MRI research studies, we investigate how factors including state of visual awareness, depth of word processing and lexico-semantic characteristics of words influence cross-language generalization of semantic representations. Using multivariate pattern analysis, we found that fully conscious and deep processing of high concrete and high frequency words leads to above-chance cross-language generalization in putative areas of the semantic network. These results have ramifications for existing psycholinguistic models and theories of meaning representation.