Stefan Elmer

Aging is associated with a high prevalence of neural and cognitive changes, which may impair life quality while placing a significant burden on the healthcare system and the economy. Nevertheless, diverse daily activities as well as deliberate practice in several domains have been proposed to benefit brain plasticity and cognition as well as to have the potential to counteract age-related decline through neuroprotective and/or compensatory mechanisms. In this review article, we will provide a summary of the gray matter alterations that have commonly been documented in simultaneous interpreters over the past twenty years. Furthermore, we will review the main literature that examined associations between simultaneous interpreting training and cognitive functions for assessing possible practice-related cognitive benefits in older age. We will also outline future directions for research in this area and highlight interventions aimed at mitigating the effects of aging on neurocognition.

With the worldwide increase in people speaking more than one language, a better understanding of the behavioural and neural mechanisms governing lexical selection, lexical access in multiple languages and code switching has attracted widespread interest from several disciplines. Previous studies documented higher costs when processing a non‐native (L2) than a native (L1) language or when switching from L2 to L1. However, studies on auditory language reception are still scarce and did not take into account the degree of switching experience. Accordingly, in the present study, we combined behavioural and electrophysiological measurements to assess lexical access in L1 and L2 as well as code switching in professional simultaneous interpreters, trainee interpreters, foreign language teachers and Anglistics students, while the participants performed a bilingual auditory lexical decision task. The purpose of this study was to expand the knowledge on code switching in auditory language processing and examine whether the degree of simultaneous interpretation experience might reduce switching costs. As a main result, we revealed that L2 compared to L1 trials, as well as switch compared to non‐switch trials, generally resulted in lower accuracies, longer reaction times and increased N400 amplitudes in all groups of participants. Otherwise, we did not reveal any influence of switching direction and interpretation expertise on N400 parameters. Taken together, these results suggest that a late age of L2 acquisition leads to switching costs, irrespective of proficiency level. Furthermore, we provided first evidence that simultaneous interpretation training does not diminish switching costs, at least when focusing on lexical access.