Violence
Research shows that, by age 8, children tend to become chronically aggressive if they believe the violence they see on TV reflects real life, but not if it teaches them that violence is evil, causes suffering or triggers disapproval or punishment. However, children who watch frightening shows to desensitize themselves to violence in their own lives are more likely to accept it in daily life.
Violence
Research on teenagers shows that they are influenced by television. A study of 700 people who watched more than one hour a day of television from adolescence to early adulthood indicated that many of them--especially boys--were more likely to be violent than those who did not.
Sex
Television's messages about sex also influence teens' views and behavior. A study linked "Sex and the City" and a character on "Friends" to an increase in teen pregnancy. But, teen viewers' acceptance of condoms increased after they watched a "Friends" episode that emphasized condom use to prevent pregnancy.
Television can influence adults' behavior as well. A study of 723 families who watched a British television series, "Driving Mum and Dad Mad," exhibited long-term improvement in parenting skills and attitudes.
Commericals
Children's and adults' product brand choices and food preferences can be shaped by the food commercials they watch.
Television modifies behavior among all age groups in both negative and positive ways. Programs that educate rather than shock or frighten viewers seem to be benign. Parents should limit children's exposure to TV violence and monitor the types of programs they watch.