In this hyper-personalized, autoplaying, all-you-can-eat mediascape, it helps to distinguish the healthy stuff from the junk. Fortnite? Probably not a great form of screen time. Video chatting with grandma? What familyunifying wonders hath Jobs wrought! Screen time, then, has become a slippery concept. Does typing a paper in Google Docs count? What about using a mapping app? Fortunately, researchers are beginning to study screen-based media in all its forms, instead of just lumping everything together like they used to. Some types of screen fare are like sugar: Limit consumption, especially before bedtime, and watch for signs of overindulgence—obesity, aggression, grade slippage. Others are more like proteins and veggies: Make sure kids get a balanced diet that includes exercise, IRL socializing, snoozing, and yes, screens. Above all, though, know thy child—some…
