A new study out of the the psychology department at Delaware County Community College in Media, Pa explores compulsive texting, which can interfere with sleep and academic performance:
http://www.apa.org/news/press/releases/2015/10/compulsive-texting-girls.aspx
http://well.blogs.nytimes.com/2015/10/12/compulsive-texting-takes-toll-on-teenagers/?_r=0
