We communicate with family with cell phones, too. I do not notice behavior’s change with family but I feel I can say what I want to say with my cell phone much easier than say orally.

Even if when we quarrel with friends, we sometimes do throughout cell phones.Sadly, bullying by using cell phone and internet began to happen much more than 15 or 20 years ago. Anyone can type whatever they want on the internet with anonymous.

Last year, there were many students died because of the bullying. It was so sad.

Of course some people fight with their friends, especially boys in elementary school and high school.

Current Japanese students seems to became more negative in the class. As long as I know, they seldom act aggressively.

Especially some of girls, they are very keen on fashion and their belonging means their social levels.

Hope it is answer for you.