 In one of their studies using the Deese-Roediger-McDermott paradigm, volunteers learned a list of related words that they had to recall after a 12-hour delay.Half learned the list at 9 a.m. and were tested at 9 p.m. whereas the other half learned the list at 9 p.m. and were tested the following day at 9 a.m. after a night's sleep.Participants who had slept performed better at recalling the list than those who stayed awake.