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Phones are everywhere, and parents are being confronted with the difficult decision of when to give their child one. This week, "At the Edge of It All" was joined by Susannah Stern, professor of communication.

Stern has studied how children interact with media and technology since the early days of the World Wide Web, and is a mom who's had to make decisions about her children's tech use as well. She talks about her research on the topic -- what goes into the decision, and why one approach doesn't fit every family. You can listen to this episode here .