Nope. Studies are showing, more and more, that the people who listen to information while they sleep may actually be learning it pretty well. For instance, in a recent study, “68 German students were asked to learn some new Dutch words before 11 p.m. Half the students were allowed to go to sleep while the words were played back to them. The other half stayed awake while listening to the words.” Guess who learned the words? – The Wall Street Journal