Kids Still Getting Too Much 'Screen Time': CDC
Nearly three-quarters of 12- to 15-year-olds spend 2 or more hours a day watching TV or on computer
Teens may think they're being social online, but that can't take the place of face-to-face relationships, Diaz stressed.
"It's important for kids to be connected to people," she said, "and not just isolated in their own rooms."
Hogan agreed. "Social-media tools are great. We all use them," she said. "But you also have to get out there and talk to people."
That advice goes for adults, too. "Parents have to be role models," Diaz said. Families need to sit down together for meals and have conversations, she said -- which means turning off the TV and ignoring the phones and other devices they use all day.
Hogan said parents should also ban TVs and computers from their kids' bedrooms. That's, in part, so they can monitor what kids are doing online. But it's also to ensure that screen time is not getting in the way of sleep time.
"Research is showing that screen use at night really disrupts sleep," Hogan said. "And it is absolutely key that kids, including teenagers, get enough sleep."