If you pay attention to media coverage of ADHD, you might have noticed an explosion of stories about ADHD and sleep this week. Here’s a sampling: Daily Mail: ADHD may be caused by children getting a lack of sleep or using mobiles and tablets before bed, experts say; Today: Does sleep deprivation cause ADHD? A new study says maybe; Guardian: Disturbed sleep patterns may be key to ADHD, study finds; So, what is this “study” and why is it getting so much attention?