Teen-agers who watch more than an hour of television a day are much more likely to become violent than the few teens who watches less, according to a study led by Jeffrey Johnson of Columbia University. His team found that both men and women are affected by violent programs on television, but teen-aged boys are especially at risk.
?We saw the jump was between less than one hour and more than one hour a day. There was a four-fold increase,? Johnson says. ?Parents should try not to let children watch more than one hour a day on the average.?