In 2006, former US president George Bush supported his embattled defense secretary Donald Rumsfeld with the words: "But I'm the decider, and I decide what is best." This quotation quickly entered the folklore of political humour. But to psychology researchers, it revealed something fundamental about human language.

Systems Neuroscience Philadelphia, PA (Scicasts) - The exchange of words, speaking and listening in conversation, may seem unremarkable for most people, but communicating with others is a challenge for people who have aphasia, an impairment of language that often happens after stroke or other brain injury.

There are several benefits of learning a new language, the latest being it promotes a better understanding (and acceptance of) psychology and diversity. The study, published in Developmental Science, tested a total of 48 study 5- and 6-year-olds who were either monolingual, simultaneous bilingual (learning two languages at once), and sequential bilingual (learning one language, then another).

This review considers speaking in a second language from the perspective of motor-sensory control. Previous studies relating brain function to the prior acquisition of two or more languages (neurobilingualism) have investigated the differential demands made on linguistic representations and processes, and the role of domain-general cognitive control systems when speakers switch between languages.