Contrary to the conventional wisdom about the negative effects of snoozing in the morning, a new study has found that delaying getting up could boost people's cognitive performance and have little overall effect on their mood and sleepiness.
Researchers "have long wondered whether snoozing affects wakefulness or sleep quality", said New Scientist, which prompted two researchers from Stockholm University in Sweden to do research into the effects of going back to sleep.
The scientists conducted a two-night laboratory study with 31 participants to assess subjects' sleepiness, mood, cortisol levels and performance on a series of maths and cognitive tests after waking up.
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The study was limited by the small sample size and the fact that it relied on self-reporting by participants, Live Science noted. However, the findings may "open doors for future research into people's waking habits, such as the different ways in which snoozers wake up".
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