Listening to foreign recordings and their translations while you sleep could help you learn a new language, although the extent of the benefit appears modest.
Knowing that our brains are always active, Flavio Schmidig, previously at the University of Bern in Switzerland, and his colleagues wanted to see if they could exploit this to help people memorise foreign words while they slept.
First, they monitored the brain activity of 30 German speakers while they spent one night in a sleep lab. …