Study reveals links between teens' mental health and time online

Psychologist and CBS News contributor Lisa Damour joins "CBS This Morning" to talk about the growing role technology plays in the lives of teenagers. A recent study reveals the links between teens' social and mental health, and how they spend time online. Nearly 50% of adolescents say they use apps like YouTube, Instagram, Snapchat and Facebook almost constantly. Damour weighs in on what this could mean for their development.