Hemispheric specialization for semantic and syntactic components of language in simultaneous interpreters

Area of Science:

• Neuroscience
• Psycholinguistics
• Cognitive Science

Background:

• Hemispheric specialization for language processing is well-documented.
• Simultaneous interpretation involves complex cognitive processes, including semantic and syntactic analysis.
• The impact of extensive practice on brain lateralization in interpreters remains an area of active research.

Purpose of the Study:

• To investigate hemispheric specializations for semantic and syntactic processing in Italian (L1) and English (L2) during simulated simultaneous interpretation tasks.
• To compare these specializations between interpreting students and professional interpreters.
• To explore how prolonged practice in simultaneous interpreting influences language lateralization.

Main Methods:

• A dichotic listening test was administered to 24 female interpretation students and 12 female professional interpreters.
• Participants identified correct translations, semantic errors, and syntactic errors in L1 to L2 and L2 to L1 translation tasks.
• Performance was analyzed based on ear of stimulus presentation to infer hemispheric involvement.

Main Results:

• Both groups performed better when L2 sentences were presented to the left ear.
• Professional interpreters were more adept at identifying semantic errors, while students excelled at recognizing syntactic errors.
• Professional interpreters exhibited distinct ear superiorities for semantic and syntactic error recognition, varying by language (L1/L2).

Conclusions:

• Prolonged practice in simultaneous interpreting appears to shape unique hemispheric specializations for language processing in professional interpreters.
• The findings suggest that experience-dependent plasticity plays a significant role in the neural organization of interpreters.
• Further research is warranted to fully elucidate the mechanisms underlying these observed lateralization patterns.