Quote:
Originally Posted by SteveEisenberg
|
From the study in the link - it talks about the circadian phase and says they are comparing the two ways of reading. I take that to mean that they intended to.
Quote:
|
A few reports have shown that these devices suppress melatonin levels, but little is known about the effects on circadian phase or the following sleep episode, exposing a substantial gap in our knowledge of how this increasingly popular technology affects sleep. Here we compare the biological effects of reading an electronic book on a light-emitting device (LE-eBook) with reading a printed book in the hours before bedtime. Participants reading an LE-eBook took longer to fall asleep and had reduced evening sleep in,reduced melatonin secretion, later timing of their circadian clock, and reduced next morning alertness than when reading a printed book. These results demonstrate that evening exposure to an LE-eBook phase-delays the circadian clock, acutely suppresses melatonin, and has important implications for understanding the impact of such technologies on sleep, performance, health, and safety.
|