A new study has found that a nap of less than an hour
has a positive effect on a person's memory recall. 

The study, conducted by postgraduate student Sara
Studte at Saarland University and published in Neurobiology of
Learning and Memory, discovered rather than distracting you from
your task, a short nap can actually improve memory function.

Sleeping _while _studying

image: Wikipedia 

The participants of the study were shown multiple
pairs of unrelated words, such as "milk taxi". Half of the
participants then took a nap, while the other half spent 30 minutes
watching a DVD. When the participants were tested again, those who
took a nap were able to remember the words as accurately as they
could immediately after they learnt them, while those who watched a
DVD remembered fewer of the pairs.

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