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Originally Posted by arjaybe
The study specified light emitting devices. The researchers didn't write the headline, and the person who wrote the article probably didn't either. Don't make the mistake of damning them for the actions of a headline-writer.
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Yes but you can damn them for their own headlines.
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The use of light-emitting electronic devices for reading, communication, and entertainment has greatly increased recently. We found that the use of these devices before bedtime prolongs the time it takes to fall asleep, delays the circadian clock, suppresses levels of the sleep-promoting hormone melatonin, reduces the amount and delays the timing of REM sleep, and reduces alertness the following morning. Use of light-emitting devices immediately before bedtime also increases alertness at that time, which may lead users to delay bedtime at home. Overall, we found that the use of portable light-emitting devices immediately before bedtime has biological effects that may perpetuate sleep deficiency and disrupt circadian rhythms, both of which can have adverse impacts on performance, health, and safety.
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1) The definition of "immediately before bedtime" has been set at 4 hours before bedtime. That's absurd. When they perform scientific studies on the effects of eating before bedtime do you believe they make people eat for 4 continuous hours with only a 15 minute bio break?
2) They didn't find that portable light-emitting devices caused the biological effects. They only tested one device (iPad).
3) They only tested one extreme use case and extrapolated it to indicate all use cases. They might as well have bashed people over the heads with iPads and concluded that use of iPads can cause severe head trauma or even death.