A new study suggests that social media sites have created a new phenomenon known as "Facebook depression". The American Academy of Pediatrics recently warned parents about the possible dangers of networking websites on their children’s mental health. Report co-author Gwenn O’Keefe described the way social interaction is changing: "For some teens and tweens, social media is the primary way they interact socially, rather than at the mall or a friend's house," she said. Ms O'Keeffe added: "A large part of this generation's social and emotional development is occurring while on the Internet and on cellphones. Parents need to understand these technologies so they can relate to their children's online world, and comfortably parent in that world."