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We enclose silence - unknown possibility - at our own risk. Jonathan Zittrain demonstrates in his recent work on generativity that the value of systems often comes from unknown uses - the Apple II became succesful when Visicalc, the first spreadsheet, was written for the platform. If you want generative uses for a technology, Zittrain warns that you need to be careful what you lock down. Lewis also cites a case in which cell biologists patented a particular series of amino acids. They had no idea their purpose, but “purifying and describing gives you a right to own.” A later set of researchers speculated that these aminos bloc the growth of cancer cells - on publishing their research, the first researchers sued them for many millions of dollars. This can very effectively prevent exloratory science, he argues. “When we enclose wilderness, we begin to give property rights in areas where we have yet to understand what’s happening.” An enclosure of silence affects the human self and the world we inhabit. How do you become a creative actor in this world? How do you beat the bounds of this commons?

This week, Sonia Livingstone's latest book, Children and the Internet: Great Expectations and Challenging Realities, is being released by Polity. As with the earlier study, it combines quantitative and qualitative perspectives to give us a compelling picture of how the internet is impacting childhood and family life in the United Kingdom. It will be of immediate relevence for all of us doing work on new media literacies and digital learning and beyond, for all of you who are trying to make sense of the challenges and contradictions of parenting in the digital age. As always, what I admire most about Livingstone is her deft balance: she does find a way to speak to both half-full and half-empty types and help them to more fully appreciate the other's perspective.

My book argues that young people's internet literacy does not yet match the headline image of the intrepid pioneer, but this is not because young people lack imagination or initiative but rather because the institutions that manage their internet access and use are constraining or unsupportive - anxious parents, uncertain teachers, busy politicians, profit-oriented content providers. I've sought to show how young people's enthusiasm, energies and interests are a great starting point for them to maximize the potential the internet could afford them, but they can't do it on their own, for the internet is a resource largely of our - adult - making. And it's full of false promises: it invites learning but is still more skill-and-drill than self-paced or alternative in its approach; it invites civic participation, but political groups still communicate one-way more than two-way, treating the internet more as a broadcast than an interactive medium; and adults celebrate young people's engagement with online information and communication at the same time as seeking to restrict them, worrying about addiction, distraction, and loss of concentration, not to mention the many fears about pornography, race hate and inappropriate sexual contact.

I think it's vital that research seeks a balanced picture, examining both the opportunities and the risks, therefore, and I argue that to do this, it's important to understand children's perspectives, to see the risks in their terms and according to their priorities.