Some experts say that we are in the middle of a global experiment. We will not know all the effects of long periods of internet use for many years. Psychologists say the hours of Internet use are not the only problem. They are also asking questions about the role of the internet in young people's lives. How is their schoolwork? Do they have good grades? Are they still playing sports? Do they have friends? An even more important question is, Are they upset when they cannot go online?