The measured sleep outcomes included total sleep duration, sleep quality, wake after sleep onset and the time it took to fall asleep.Īfter not finding significant differences in sleep outcomes across the three categories, the researchers split the sample into two separate groups: one which averaged about seven hours of sleep and another that slept less than six hours each night. Individuals who were assigned to use their smartphone also had an app installed to monitor their phone use. They were asked to spend at least eight hours in bed and wore an accelerometer on their wrist to record their sleep activity. The study included 167 emerging adults ages 18 to 24 who use cell phones daily. “Night Shift is not superior to using your phone without Night Shift or even using no phone at all.”
“In the whole sample, there were no differences across the three groups,” Jensen said. To test the theory, BYU psychology professor Chad Jensen and researchers from the Cincinnati Children’s Hospital Medical Center compared the sleep outcomes of individuals in three categories: those who used their phone at night with the Night Shift function turned on, those who used their phone at night without Night Shift and those who did not use a smartphone before bed at all. However, a new study from BYU published in Sleep Health challenges the premise made by phone manufacturers and found that the Night Shift functionality does not actually improve sleep. Until recently, claims of better sleep due to Night Shift have been theoretical.
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