Sonia Livingstone is interested in young people's technology use, and how this is affecting friendships, family and learning in the digital age.
She's a Professor in the Department of Media and Communications at the London School of Economics and Political Science, and in her new book 'The Class: Living and Learning in the Digital Age' (NYU Press) she looks at how a group of 13-year-olds are using technology at home and in the classroom.