The article entitled "Continuity of aggression from childhood to early adulthood as a predictor of life outcomes: implications for the adolescent-limited and life-course-persistent models" is about a longitudinal study done on a group of individuals from the time they were eight years old to the time they were forty eight. The study compared the outcomes of both high and low aggressiveness throughout ones life.
There was a moderate amount of aggressiveness found throughout the years in both male and female participants. One finding that I found particularly interesting was that the stable rate of aggression amongst the different age groups was due to the highly aggressive people remaining highly aggressive and the less aggressive people remaining less aggressive throughout the years of the study rather than the individuals fluctuating in aggressive behavior.
The study concluded that, in comparison to those with low levels of aggression, those with continuously high levels had less desirable outcomes. For instance, people who displayed higher levels of aggression were significantly more likely to partake in criminal activities, violate traffic laws, have spousal problems, and act violently than those with low aggressiveness. the outcomes for the people who showed moderate levels of aggressiveness throughout the years did not differ greatly enough from those who had low levels to be statistically significant. Also, those who began to display highly aggressive behavior in early adulthood had more negative outcomes, although not quite as bad as those who displayed the behavior from childhood.
I know from earlier readings that aggressive behavior is mostly caused by a lack of serotonin or serotonin receptors in the brain. This article made me wonder if there is a way to overcome the genetic predisposition for aggression. The study did not start until the kids were eight years old, and had undoubtedly been exposed to many different things, so I think it would be interesting to observe a group of newborns who's parents show highly aggressive behavior being raised in different environments. There is a clear nature vs. nurture battle here, and I'm guessing both play a role, but I think tweaking the study in the article would enlighten us a bit more on the issue.
Huesmann, L. Rowell, Eric F. Dubow, and Paul Boxer. "Continuity of aggression from childhood to early adulthood as a predictor of life outcomes: implications for the adolescent-limited and life-course-persistent models." Aggressive Behavior 35.2 (March-April 2009): 136(14). Academic OneFile. Gale. University of Illinois Urbana-Champaign.