World War II profoundly changed adolescent life and relationships between parents and children. One of the major reasons for this change is the growth of the mass media. Teens are not only passive recipients of mass media's messages; they interact with the images the media presents to them, making choices about what content they wish to attend to. The process is interactive, and the end result is the shaping of teen attitudes and behavior, even as teens shape the wider culture. Music, movies, and television have had the most powerful effects on teens. Music and movies were also powerful before World War II; but in the postwar world, economic prosperity contributed to a sharp increase in the birth rate, and the children of that "baby boom" generation grew up to form an enormous teen market. In the 1950s, the advent of television on a...