Another way to approach the question of stability of the invasions in the range of development is through research in the study of long-term testing of the same group of people over many years. Ron Evans and his colleagues (1987, e e; Ron Ron Huesmann, a video and a Walder; 1984, Nevis e Walder, Ron & Huesmann 1977) take one length of study, such as aggression, which tested 600 children start when children are in the third. Grade (about 8 years), and 22 consecutive years using this method is long, researchers hope to examine the stability of aggressive behavior from childhood into middle of teen and adult.
When a child is in third grade, they were asked a question about acting seriously. One such question is '' who is pushing the others? '' the boy can be named as many of their friends that they want to make points that represent aggressive peer that is defined for each child. As the initial stage of their study, the researchers compared the invasion to points raised patterns and found that parents who have a less acceptant and nurturant home tend to have more children than schools that behaves, children brought up by their parents more and more nurturant acceptant parents