The question about trilingualism raises important issues about the practicalities of linking this research to the configuration of the brain rather than social factors. Presumably many people who learn a third language have done so as a choice (although there are many parts of the world where three languages are used).
linguistics in the media
An interesting article about bilingualism in The Observer today, showing the advantages of being bilingual.
http://www.guardian.co.uk/technology/2011/jun/12/ellen-bialystok-bilingual-brains-more-healthy
The question about trilingualism raises important issues about the practicalities of linking this research to the configuration of the brain rather than social factors. Presumably many people who learn a third language have done so as a choice (although there are many parts of the world where three languages are used).