Swipe as I do, not as I say.

That could be the mantra of parents who teach their children how much time to spend on their iPhones, Androids, tablets, computers and watching television. Parents with tweens and teens (children aged eight to 18 years of age) spend over 9 hours with screen media each day, according to “The Common Sense Census: Plugged-In Parents of Tweens and Teens,” a survey of 1,700 such parents by Common Sense Media, a San Francisco-based organization that examines the impact of technology and media on families. That compares to the more than 4.5 hours of screen media tweens spend on screen media on average every day and 6.5 hours spent by teenagers every day, a similar survey last year of more than 2,650 children by the same organization.

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“We hope that taking an honest look at how parents use media and tech, how they manage and monitor their kids, and how they talk to kids about media will help us all raise media-savvy kids and good digital citizens,” said Michael Robb, director of research at Common Sense Media and author of the latest study. (And all of that swiping is expensive: The profit share of Apple AAPL, -4.19% hit a record 91% in the third quarter of 2016, compared with 62.2% in the second quarter, according to Boston-based research firm Strategy Analytics, helped by the recall of Samsung’s 005930, -1.02% explosion-prone Note 7. Prices for the iPhone 7 start at $769.)

“ ‘We hope that taking an honest look at how parents use media and tech will help us all raise media-savvy kids.’ ” — –Michael Robb, director of research at Common Sense Media

Here’s how the viewing habits of parents with tween and teenage children break down: They average 9 hours, 22 minutes with screen media each day, with 82% or 7 hours, 43 minutes of that time devoted to personal screen media activities such as watching TV, social networking and video gaming, with the rest used for work. Despite this, a majority (78%) of all parents believe they are good media and technology role models for their children. And yet 43% of parents are worried about their children spending too much time online with one-third of parents concerned that technology use is hurting their children’s sleep.

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Hispanic parents said they were more aware and more concerned about their children’s online activities, Robb found. Some 60% of Hispanic parents were concerned about their children spending too much time online, as compared to 37% of Caucasian parents and 33% of black parents. Role-modeling is a great start to promoting a healthy digital lifestyle, and parents can help establish good habits through family rituals like device-free dinners and media activities that strengthen relationships,” Robb said. “The sheer amount of media and tech in our lives makes it tough to monitor and manage our own use.”

And there are no hard-and-fast rules about how much is OK or, indeed, too much. “Parents don’t need to be scared,” Yalda Uhls, a Los Angeles-based child psychologist and author of “Media Moms & Digital Dads: A Fact Not Fear Approach to Parenting in the Digital Age,” recently told MarketWatch. Children use social media to connect with friends and develop their identities, she says. “By not allowing them to be on, they’re not being in one of the places that their friends hang out.” And two-thirds of parents say that monitoring media use is more important than respecting kids’ privacy, the Common Sense Media study also found.

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That said, even babies are using gadgets. Some 38% of children as young as two use smartphones, up from 10% in 2011, a 2013 study by Common Sense Media found. And a separate study found that more than half of babies in low-income households are tapping on smartphones or tablets by age 2, with some spending more than an hour on them. That’s according to a study published in the November 2015 journal Pediatrics, the official journal of the American Academy of Pediatrics. The organization discourages the use of computers, smartphones and tablets by children under age 2, but there’s little long-term research on the effects of using them at such a young age.