Tsukuba, Japan—Most studies investigating the impact of sleep deprivation and circadian rhythm disruption on concentration and work performance have relied on self-reported questionnaires or ...

Since the first issue of the journal Sleep was published back in 1978, over 300,000 research studies have dug into the science of sleep. Many of these have been “single-association” studies, which ...

The survey of 2,000 Americans revealed that 96% are guilty of this, where they intentionally stay up late to enjoy personal ...

When it comes to sleep, traditional advice has focused on the number of hours a person sleeps. But for older adults, the quality of sleep may affect cognitive performance the following day regardless ...

Sleeping nine hours or more per night is associated with worse cognitive performance, and it is even more the case for those with depression. There might be such a thing as getting too much of a good ...

Researchers on the PSQI (L to R): David Kupfer, Charles Reynolds, Daniel Buysse. Not pictured: Timothy Monk and Susan Berman (Courtesy) Sleep still baffles parts of the scientific community, but ...