Russian researchers found out that short daytime sleep helped settle words into memory.

      Scientists from the Institute of Higher Nervous Activity and Neurophysiology performed tests of a group of male and female human beings. Two groups learned 60 pairs of words, not connected by sense, then after tests they learned 30 more pairs. After lunch, one group had 1-hour long sleep in a noise-protected room, and another watched movies about nature. After sleep, first group also watched movies. Both groups tried sleeping and watching in their turns.

      Tests showed that volunteers better learned words, which were repeated only once. This may indicate that short sleep during daytime helps put into memory things that were not learned good enough.

      Source: Science & Technologies