Get dream results by swotting before going to bed
Last-minute swotting for an exam before going to bed might be a good tactic for students, according to new research on the benefits of "sleeping on it".
Sleep almost doubles the chances of remembering previously forgotten information, scientists found.
They believe sleep makes memories more accessible and sharpens our power of recall.
Volunteers taking part in the study were asked to remember made-up words either before a night's sleep or after 12 hours of wakefulness.
The "sleepers" were much better at recalling the words than the participants who remained awake.
Psychologist Dr Nicolas Dumay said: "Sleep almost doubles our chances of remembering previously unrecalled material.
"The post-sleep boost in memory accessibility may indicate that some memories are sharpened overnight. This supports the notion that, while asleep, we actively rehearse information flagged as important."