This data is from a large-scale, nationally representative survey, the second in Common Sense's series on children's media use; the first was conducted in 2011 (Zero to Eight: Children's Media Use in America). By replicating the methods used in 2011, the study documented how children's media environments and behaviors have changed. The study universe were parent's of children ages 0 to 8 in the U.S., and covered media ranging from books/reading and music to mobile interactive media like smartphones and tablets.