Aresearcher was interested in whether watching violence affected children's behaviors. to examine this, he showed a violent film to one group of preschoolers and a nonviolent film to a second group of preschoolers. following the films, the behaviors of the two groups were compared. in this study, the comparison group was the children:

who watched the nonviolent film

Explanation:

In an experiment to identify the effect of one variable to another the effects of the independent variable is studied on two groups. The group which receives the actual treatment is called the treatment group and the group that does not receive the treatment is called the comparison group.

Here, the researcher wants to know whether violent films have an effect on the behavior of children. So, one group is shown violent films and the other group is shown non violent films. The behavior of the children who watched the violent films is compared with the group that watched the non violent films.

Hence, the comparison group was the group that watched the non violent films.