New study links phone use and mental health issues in teens
A new study in the journal Child Development shows nighttime usage of a cell phone can increase anxiety and depression in teenagers and reduce self-esteem. This is the first study that shows a direct link between screen time and mental health. Psychologist and CBS News contributor Lisa Damour joins "CBS This Morning" to discuss tips for parents who want to decrease their teens' cell phone usage and how screen time affects important sleep habits.