Career
He is a researcher at the University of Edinburgh whose work centres on the impact on bilingualism on cognitive functions, cross-linguistic studies of aphasia, and the relationship between language, cognition and culture in neurodegenerative brain diseases. He is president of the World Federation of Neurology Research Group on Aphasia, Dementia and Cognitive Disorders (2010–2016). He is best known for his work on the impact of bilingualism on cognitive ageing, in particular the finding that in people who speak two languages (whether from childhood or acquired later in life), dementia is delayed.
Bak,, Jack J.