Social Media Can’t sleep? Stop looking at your phone or tablet in bed, says study Blame America’s sleep deprivation on glowing screens. By Michael SebastianMarch 7, 2011 SHARE Those habits might be keeping you awake, according to a study by the National Sleep Foundation (NSF). The NSF says the glowing screens on the TV, computer, cell phone, or tablet are affecting your sleep. The Washington, D.C.-based organization said: To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.